Physics Semester 2 All Multiple Choice Review

Which of the following can be a centripetal force? Select one: a. gravity b. friction c. all of these d. tension

c

A generator converts ______________ energy into electrical energy. Select one: a. chemical b. potential c. kinetic d. mechanical

d

Refraction is the bending of a wave disturbance as it passes at an angle from one ____ into another. Select one: a. boundary b. glass c. area d. medium

d

The current in an electron beam in a cathode-ray tube is 7.0 ´ 10 A. How much charge hits the screen in 5.0 s? Select one: a. 5.6 x 10-2 C b. 2.8 x 103 C c. 5.3 x 10-6 C d. 3.5 x 10-4 C

d

The speed of light is incredibly fast. Physicists consider it to be Select one: a. variable. b. infinite. c. immeasurable. d. finite.

d

What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m? Select one: a. 4.0 m/s2 b. 8.0 m/s2 c. 1.0 m/s2 d. 2.0 m/s2

d

Which factor is least likely to affect the resistance of a conductor? Select one: a. the length of the conductor b. the temperature of the conductor c. the material the conductor is made from d. the overall shape of the conductor

d

Which of the following is approximately equal to the currently accepted value for the speed of light? Select one: a. 3.00 10^10 m/s b. 3.00 x 10^6 m/s c. 3.0 x 10^9 m/s d. 3.00 x 10^8 m/s

d

Which of the following quantities measures the ability of a force to rotate or accelerate an object around an axis? Select one: a. axis of rotation b. lever arm c. tangential force d. torque

d

A conductor, such as a copper rod, can be charged by contact with another charged object only if the metal rod is Select one: a. insulated from Earth. b. grounded to Earth. c. an insulator. d. positively charged.

a

Spherical mirrors suffer from spherical aberration; therefore, the rays __________ intersect exactly in a single point. Select one: a. do not b. always c. often d. can

a

A surface charge can be produced on insulators by Select one: a. grounding. b. polarization. c. induction. d. contact.

b

When a light ray moves from air into glass, which has a higher index of refraction, its path is Select one: a. not bent. b. bent toward the normal. c. bent away from the normal. d. parallel to the normal.

b

Which of the following is not a component of the electromagnetic spectrum? Select one: a. radio waves b. sound waves c. microwaves d. light waves

b

Which process will double the power dissipated by a resistor? Select one: a. doubling the current and doubling the potential difference b. doubling the current and making the resistance half as big c. doubling the current while making the potential difference half as big d. doubling the current while doubling the resistance

b

Three resistors with values of 4.0 W, 6.0 W, and 8.0 W, respectively, are connected in series. What is their equivalent resistance? Select one: a. 6.0 Ω b. 8.0 Ω c. 18 Ω d. 1.8 Ω

c

A circuit breaker is designed to limit the amount of ____________ in a circuit Select one: a. resistance b. voltage c. potential difference d. current

d

The magnetic field of a current loop is most similar to that of a Select one: a. horseshoe magnet. b. irregular magnet. c. circular magnet. d. bar magnet.

d

The symbols in the diagram below indicate https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/42803/2/1792/18%201.JPG Select one: a. one capacitor, three lamps, and one closed switch. b. three resistors, one open switch, and one battery. c. one battery, three resistors, and one closed switch. d. one battery, three lamps, and one open switch.

d

Three lamps are arranged as shown below. Which single lamp must burn out to cause all of the lamps to go out? https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/42803/6/1796/18%206.JPG Select one: a. lamp 3 b. lamp 1 c. No single lamp will cause all to go out. d. lamp 2

d

What describes φM? Select one: a. magnetic flux b. ABcosΘ c. the number of field lines that cross a certain area d. all of these

d

https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/46035/4/1960/Capture.JPG Which compass needle orientation in the figure above might correctly describe the magnet's field at that point? Select one: a. c b. b c. d d. a

d

A certain circuit connected to a 1.5 V battery dissipates 2.0 W of power. If a second battery is added to the circuit, resulting in a potential difference of 3.0 V, what power will be dissipated? Assume that the resistance of the circuit does not change. Select one: a. 4.0 W b. 2.0 W c. 1.0 W d. 0.50 W

a

A current-carrying conductor in and perpendicular to a magnetic field experiences a force that is Select one: a. perpendicular to the current. b. parallel to the current. c. inversely proportional to the velocity. d. inversely proportional to the potential difference.

a

A microscopic magnetic region composed of a group of atoms whose magnetic fields are aligned in a common direction is called a ____. In most materials, when these groups are randomly distributed, the substance will show ____ magnetism. Select one: a. domain; no b. pole; some c. cell; unusual d. ion; strong

a

A repelling force occurs between two charged objects when the charges are of Select one: a. like signs. b. equal magnitude. c. unequal magnitude. d. unlike signs.

a

A short circuit is Select one: a. a circuit without a load that presents little resistance to electron flow and is potentially hazardous. b. potentially hazardous. c. a circuit without a load that presents little resistance to electron flow. d. a circuit in which electrons cannot flow.

a

A solenoid is in an upright position on a table. A counterclockwise current of electrons—when viewed from above—causes the solenoid to have a ____ magnetic pole at its bottom end. If a compass is placed at the top of the solenoid, the north pole of the compass would be ____. Select one: a. south; repelled b. north; repelled c. north; attracted d. south; attracted

a

A wire carries a steady current of 0.1 A over a period of 20 s. What total charge moves through the wire in this time interval? Select one: a. 2 C b. 200 C c. 20 C d. 0.005 C

a

According to the right-hand rule, in what direction will the fingers curl? Select one: a. in the direction of the magnetic field, B b. in the direction of the current c. in the direction of the magnetic field's force d. in the direction of the magnetic field's movement

a

An electric force F exists between two objects, both having the charge q. If the charge on one object is doubled to 2q, the force between the objects becomes Select one: a. 2F b. 4F c. 1/2 F d. 1/4 F

a

Charge is most easily transferred in Select one: a. conductors. b. semiconductors. c. nonconductors. d. insulators.

a

Electric charge is Select one: a. conserved. b. found only in insulators. c. not conserved. d. found only in a conductor.

a

Even when the sun has passed just below the horizon, we can still see the sun for a few more minutes because the sun's light rays are ____________ by the atmosphere. Select one: a. refracted b. expanded c. reflected d. inverted

a

How does a positive charge move in an electric field in order to gain electrical potential energy? Select one: a. parallel to and in the opposite direction to the electric field b. parallel to and in the same direction as the electric field c. perpendicular to the electric field d. parallel to the electric field

a

How does the gravitational force between two objects change if the distance between the objects doubles? Select one: a. The force decreases by a factor of 4. b. The force decreases by a factor of 2. c. The force increases by a factor of 4. d. The force increases by a factor of 2.

a

How does the potential difference across the bulb in a flashlight compare with the terminal voltage of the batteries used to power the flashlight? Select one: a. The potential difference is equal to the terminal voltage. b. The potential difference is less than the terminal voltage. c. It cannot be determined unless the internal resistance of the batteries is known. d. The potential difference is greater than the terminal voltage.

a

How many focal points and focal lengths do converging and diverging lenses have? Select one: a. two, one b. two, two c. one, one d. one, two

a

If a 9.0 V battery is connected to a lightbulb, what is the potential difference across the bulb? Select one: a. 9.0 V b. 4.5 V c. 18 V d. 3.0 V

a

If the angle of incidence is greater than the critical angle, the ray is ____________ at the boundary. Select one: a. entirely reflected b. refracted c. partially reflected d. not reflected

a

If the charge is tripled for two identical charges maintained at a constant separation, the electric force between them will be changed by what factor? Select one: a. 9 b. 1/9 c. 2/3 d. 18

a

If the torque required to loosen a nut on a wheel has a magnitude of 40.0 N·m and the force exerted by a mechanic is 133 N, how far from the nut must the mechanic apply the force? Select one: a. 30.1 cm b. 15.0 cm c. 1.20 m d. 60.2 cm

a

In a wire in which the net flow of electrons is to the right, the direction of the conventional current in the wire Select one: a. is to the left. b. is the same direction as the electron flow. c. cannot be determined. d. depends on the potential difference.

a

In any complex resistance circuit, the voltage across any resistor in the circuit is always Select one: a. equal to or less than the voltage source. b. greater than the voltage source. c. less than the voltage source. d. equal to the voltage source.

a

In soft magnetic materials such as iron, what happens when an external magnetic field is removed? Select one: a. The material returns to an unmagnetized state. b. The domain alignment persists. c. The orientation of domains fluctuates. d. The material becomes a hard magnetic material.

a

In what direction does a parallel ray from an object proceed after passing through a diverging lens? Select one: a. The ray is directed away from the focal point, F. b. The ray continues parallel to the principal axis. c. The ray passes through the center of the lens. d. The ray passes through the center of curvature, C.

a

Several resistors are wired in series. What is true about this circuit? Select one: a. The total circuit current is the same as the current through any one of the resistors. b. The current in any single resistor is determined by its resistance and the voltage of the power supply. c. The sum of the currents through each of the resistors is equal to the total circuit current. d. The voltage across any resistor is the same as the voltage of the power supply.

a

Suppose a doorknob is placed at the center of a door. Compared with a door whose knob is located at the edge, what amount of force must be applied to this door to produce the torque exerted on the other door? Select one: a. two times as much b. one-half as much c. one-fourth as much d. four times as much

a

The amount of charge that moves through the filament of a lightbulb in 2.00 s is 2.67 C. What is the current in the lightbulb? Select one: a. 1.33 A b. 5.34 A c. 0.835 A d. 0.417 A

a

The centripetal force on an object in circular motion is Select one: a. in the same direction as the centripetal acceleration. b. in the direction opposite the centripetal acceleration. c. in the same direction as the tangential speed. d. in the direction opposite the tangential speed.

a

The current through one resistor in a parallel resistor circuit is always Select one: a. less than the total current in the circuit. b. more than the total current in the circuit. c. the same as the current in the other resistors in the circuit. d. equal to the total current in the circuit.

a

The diagram on the right represents a cross-section of a charged copper rod. Which of the arrows best represents a field line in the rod's electric field? https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/35531/6/1756/Capture.JPG Select one: a. D b. C c. B d. A

a

The diagram represents a spherically shaped conductor with the protrusions shown. If this conductor is given an electrostatic charge, which letter best represents the location of the largest concentration of charge? https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/35531/8/1758/Capture.JPG Select one: a. B b. none; The charge is evenly distributed. c. C d. A

a

The direction of the force on a current-carrying wire in an external magnetic field is Select one: a. perpendicular to both the current and the magnetic field. b. perpendicular to the magnetic field only. c. perpendicular to the current only. d. parallel to the current and to the magnetic field.

a

The electrical energy stored in a capacitor is Select one: a. All of these. b. inversely proportional to the capacitance of the capacitor. c. proportional to the square of the voltage across the capacitor. d. directly proportional to the voltage across the capacitor.

a

The lines of the magnetic field around a current-carrying wire Select one: a. form concentric circles around the wire. b. point away from the wire. c. are parallel with the wire. d. point toward the wire.

a

The part of a circuit that converts electrical energy to other forms of energy is Select one: a. the load. b. the switch. c. a wire. d. a battery.

a

Three resistors with values of 3.0 Ω , 6.0 Ω , and 12 Ω are connected in parallel. What is the equivalent resistance (Ω ) of this combination? Select one: a. 1.7 b. 21 c. 0.26 d. 9.0

a

What distinguishes a parallel circuit from a series circuit? Select one: a. A parallel circuit always has more than one current path. b. The current in a parallel circuit is greater than in a series circuit. c. The voltage across the resistors in a parallel circuit is greater than it is in a series circuit. d. The equivalent resistance of a parallel circuit is less than that of a series circuit.

a

What is the path of an electron moving parallel to a uniform magnetic field? Select one: a. straight line b. circle c. parabola d. ellipse

a

What is the path of an electron moving perpendicular to a uniform magnetic field? Select one: a. circle b. parabola c. straight line d. ellipse

a

What kind of force provides the centripetal force on the bicycle? Select one: a. friction b. air resistance c. normal force d. gravitational force

a

What kind of simple machine are you using if you pry a nail from a board with the back of a hammer? Select one: a. a lever b. a pulley c. a wedge d. a screw

a

What occurs when two charges are moved closer together? Select one: a. The force between the charges increases. b. Coulomb's law takes effect. c. The total charge increases. d. The electric field doubles.

a

What term describes a change in the speed of an object in circular motion? Select one: a. tangential acceleration b. centripetal acceleration c. centripetal force d. tangential speed

a

When an object is moving with uniform circular motion, the centripetal acceleration of the object Select one: a. is directed toward the center of motion. b. is perpendicular to the plane of motion. c. is circular. d. is zero.

a

When an object is moving with uniform circular motion, the object's tangential speed Select one: a. is constant. b. is circular. c. is perpendicular to the plane of motion. d. is directed toward the center of motion.

a

When light passes at an angle to the normal from one material into another material in which its speed is higher, Select one: a. it is bent away from the normal to the surface. b. it always lies along the normal to the surface. c. it is bent toward the normal to the surface. d. it is unaffected.

a

When light passes at an angle to the normal from one material into another material in which its speed is lower, Select one: a. it is bent toward the normal to the surface. b. it always lies along the normal to the surface. c. it is bent away from the normal to the surface. d. it is unaffected.

a

Where is the electric field of an isolated, uniformly charged, hollow metallic sphere greatest? Select one: a. at the sphere's outer surface b. at infinity c. at the center of the sphere d. at the sphere's inner surface

a

Which is correct regarding the terminal voltage of a battery? Select one: a. Terminal voltage is always less than the emf of the battery. b. The emf of the battery is the potential difference across its terminals. c. Terminal voltage is always the same as the emf of the battery. d. Terminal voltage is always greater than the emf of the battery.

a

Which of the following best represents a difference between electric force and gravitational force? Select one: a. Electric force can both attract and repel b. Electric force is inversely proportional to the square of the distance between objects. c. Gravitational force is stronger than electric force. d. Gravitational force exists between objects that are not touching.

a

Which of the following correctly expresses Kepler's second law? Select one: a. A planet sweeps out equal areas of its orbit in equal time intervals. b. A planet's orbital period is proportional to the planet's distance from the sun. c. Planets travel in elliptical orbits with the sun at one focus. d. A planet's orbital period is independent of the planet's mass.

a

Which of the following is not a characteristic of electrical potential energy? Select one: a. It results from a single charge. b. It is a form of mechanical energy. c. It is associated with a charge in an electric field. d. It results from the interaction between charges.

a

Which of the following situations is not true for magnets? Select one: a. Unlike poles repel each other. b. A north pole and a south pole will attract each other. c. North poles repel each other. d. Like poles repel each other.

a

Which of the following statements about a battery as a source of electric current is not true? Select one: a. The terminal voltage of a battery is equal to its emf. b. A battery provides the energy that moves charge. c. A battery is a source of emf. d. The terminal voltage of a battery is the voltage it delivers to the load.

a

You want to determine the current in a complex circuit. Which piece of information will be least helpful in making your determination? Select one: a. the number of devices in the circuit b. the voltage across each element in the circuit c. the equivalent resistance of the circuit d. the current in each element in the circuit

a

https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/35938/8/1304/Capture.JPG Select one: a. Ball 4 has a positive charge. b. It is not possible to determine the charge on ball 4. c. Ball 4 may have either a positive or negative charge. d. Ball 4 has a negative charge.

a

A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line? Select one: a. centripetal force b. inertia c. centripetal acceleration d. centrifugal force

b

A charge moves between two points in a uniform electric field. What information is needed to determine the potential difference between the two points? Select one: a. the direction of the field and the displacement in the field b. the magnitude of the field and the displacement in the field c. the magnitude of the charge, the magnitude of the field, and the displacement in the field d. the magnitude of the charge and the magnitude of the field

b

A circuit has a continuous path through which charge can flow from a voltage source to a device that uses electrical energy. What is the name of this type of circuit? Select one: a. a short circuit b. a closed circuit c. a circuit schematic d. an open circuit

b

A heavy bank-vault door is opened by the application of a force of 3oo. N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque? Select one: a. 300 N·m b. 240 N·m c. 120 N·m d. 360 N·m

b

A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the Select one: a. velocity reach a maximum. b. acceleration reach a maximum. c. acceleration reach zero. d. velocity reach zero.

b

A material is sometimes placed between the plates of a capacitor to increase the capacitance. What is this material called? Select one: a. a semiconductor b. a dielectric c. an amplifier d. a conductor

b

A negatively charged rod is brought near a metal sphere that is not grounded. When the rod is taken away, the metal sphere will have Select one: a. a positive charge. b. no charge. c. an induced charge. d. a negative charge.

b

According to Copernicus, how do planets move? Select one: a. Planets move in elliptical orbits with the sun at one focus. b. Planets move in circular orbits around the sun. c. Planets move in circular orbits around Earth. d. Planets move on small circles called epicycles while simultaneously orbiting Earth.

b

All of the following images can be formed by a converging lens except which one? Select one: a. image at infinity b. virtual, inverted, and same size c. real, inverted, and reduced d. real, inverted, and same size

b

An attracting force occurs between two charged objects when the charges are of Select one: a. equal magnitude. b. unlike signs. c. like signs. d. unequal magnitude.

b

Centripetal acceleration must involve a change in Select one: a. both an object's speed and direction. b. an object's velocity. c. an object's tangential speed. d. the radius of an object's circular motion.

b

Centripetal force can be calculated from centripetal acceleration by Select one: a. squaring the acceleration and dividing by the radius. b. multiplying by the mass. c. dividing by the mass. d. squaring the acceleration, multiplying by the mass, and dividing by the radius.

b

Conductors can be charged by ____, while insulators cannot. Select one: a. contact b. induction c. grounding d. polarization

b

Electric force and gravitational force are alike in that both forces Select one: a. depend on mass. b. are field forces. c. depend on charge. d. act only when objects are touching.

b

Four resistors having equal values are wired as a parallel circuit. How does the equivalent resistance of the circuit compare to the resistance of a single resistor? Select one: a. The equivalent resistance is the same as the resistance of any single resistor. b. The equivalent resistance is one-fourth the resistance value of a single resistor. c. The equivalent resistance is greater than the resistance of any single resistor d. The equivalent resistance is one-half the resistance value of a single resistor.

b

How is current affected if the number of charge carriers decreases? Select one: a. The current is not affected. b. The current decreases. c. The current initially decreases and then is gradually restored. d. The current increases.

b

How is current affected if the time interval over which the charge passes through a given area decreases while the amount of charge remains the same? Select one: a. The current is not affected. b. The current increases. c. The current decreases. d. The current initially increases and then is gradually restored.

b

If a 75 W lightbulb operates at a voltage of 120 V, what is the current in the bulb? Select one: a. 195 A b. 0.62 A c. 9000. A d. 1.6 A

b

If an irregularly shaped conductor is in electrostatic equilibrium, charge accumulates Select one: a. where the radius of curvature is largest. b. where the radius of curvature is smallest. c. evenly throughout the conductor. d. in flat places.

b

If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do? Select one: a. Tie a rope to the end of the wrench and pull on the rope. b. Use a wrench with a longer handle. c. Use a wrench with a shorter handle. d. You should exert a force on the wrench closer to the bolt.

b

In a permanent magnet, Select one: a. domains are always randomly oriented. b. domain alignment persists after the external magnetic field is removed. c. the magnetic fields of the domains cancel each other. d. domain alignment becomes random after the external magnetic field is removed.

b

In any complex resistance circuit, the current through any resistor in the circuit is always Select one: a. less than the total current through the circuit. b. less than or equal to the total circuit current. c. equal to the total circuit current. d. less than or greater than the total circuit current.

b

In what direction do compass needles deflect in relation to the concentric circles of the magnetic field that is found around a current-carrying wire? Select one: a. away from the concentric circles b. tangential to the concentric circles c. toward Earth's North Pole irrespective of the concentric circles d. perpendicular to the concentric circles

b

Pigments rely on colors of light that are Select one: a. added. b. subtracted. c. reflected. d. refracted.

b

Resultant force on a charge is the ____ sum of the individual forces on that charge. Select one: a. scalar b. vector c. negative d. individual

b

The centripetal force on an object in circular motion is Select one: a. in the plane of the object's motion and in the direction opposite the tangential speed. b. in the plane of the object's motion and perpendicular to the tangential speed. c. in the plane of the object's motion and in the same direction as the tangential speed. d. perpendicular to the plane of the object's motion.

b

The degree to which an object attracts other objects is measured by the object's Select one: a. weight. b. gravitational mass. c. inertial mass. d. gravitational field strength.

b

The diagram shows the electric field lines around two charges that have been brought near each other. From the diagram you can infer that the charge of the left is ___________ than the charge on the right. https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/35531/5/1755/E%20field%20lines.JPG Select one: a. negative and smaller in magnitude b. positive and larger in magnitude c. negative and larger in magnitude d. positive and smaller in magnitude

b

The energy gained by electrons as they are accelerated by an electric field is Select one: a. not affected by the gain in energy due to collisions. b. greater than the average loss in energy due to collisions. c. less than the average loss in energy due to collisions. d. equal to the average loss in energy due to collisions.

b

The focal length for a converging lens is Select one: a. always negative. b. always positive. c. dependent on the location of the object. d. dependent on the location of the image.

b

The focal length for a diverging lens is Select one: a. always positive. b. always negative. c. dependent on the location of the image. d. dependent on the location of the object.

b

Three resistors with values of 3.0 Ω , 6.0 Ω , and 12 Ω are connected in series. What is the equivalent resistance (in Ω )of this combination? Select one: a. 1.7 b. 21 c. 0.58 d. 7.0

b

Three resistors with values of 4.0 Ω , 6.0 Ω , and 10.0 Ω are connected in parallel. What is their equivalent resistance, Ω? Select one: a. 6.0 b. 1.9 c. 20.0 d. 7.3

b

Total internal reflection occurs only if the Select one: a. index of refraction of the second medium is greater than one. b. index of refraction of the first medium is greater than the index of refraction of the second medium. c. index of refraction of the first medium is greater than one. d. index of refraction of both media are the same.

b

Two point charges, initially 2 cm apart, are moved to a distance of 8 cm apart. By what factor does the resulting electric force between them change? Select one: a. 2 b. 1/16 c. 1/4 d. 4

b

Two resistors and a battery are wired in a series circuit. One resistor has twice the resistance of the other resistor. What is true about the voltage across the two resistors? Select one: a. Each resistor has half the battery voltage across it. b. One-third of the battery voltage is across the lower value resistor. c. Two-thirds of the battery voltage is across the lower value resistor. d. One-third of the battery voltage is across the higher value resistor.

b

Various wavelengths of incoming light are bent at different angles when they encounter a refracting medium. What is the name of this phenomenon? Select one: a. Snell's law b. dispersion c. image restructuring d. internal reflection

b

What do physicists call large groups of atoms whose net spins are aligned because of strong coupling between neighboring atoms? Select one: a. magnetic zones b. magnetic domains c. magnetic regions d. magnetic sectors

b

What does G stand for? Select one: a. gravitational force b. the constant of universal gravitation c. gravitational field strength d. free-fall acceleration

b

What does efficiency measure? Select one: a. the ratio of work input to work output b. the ratio of work output to work input c. the ratio of output force to input force d. the ratio of input force to output force

b

What happens when a rubber rod is rubbed with a piece of fur, giving it a negative charge? Select one: a. Electrons are added to the fur. b. Electrons are added to the rod. c. Protons are removed from the rod. d. The fur is left neutral.

b

What is a measure of the ability of a force to rotate or accelerate an object around an axis? Select one: a. lever arm b. torque c. axis of rotation d. centripetal force

b

What is the potential difference across a 10 Ω resistor if the current in the resistor is 3.0 A? Select one: a. 0.3 V b. 30 V c. 15 A d. 3 V

b

What kind of simple machine is like two inclined planes placed back-to-back? Select one: a. a wheel and axle b. a wedge c. a lever d. a screw

b

What quantity measures the output force of a machine relative to the input force? Select one: a. leverage b. mechanical advantage c. torque d. efficiency

b

What quantity measures the work done by a machine relative to the work done on a machine? Select one: a. leverage b. efficiency c. torque d. mechanical advantage

b

What relationship does the thin lens equation show? Select one: a. object stance and image stance b. object distance and image distance c. object size and image size d. object magnification and image magnification

b

When a capacitor discharges, Select one: a. charges move from one plate to the other until equal and opposite charges accumulate on the two plates. b. charges move through the circuit from one plate to the other until both plates are uncharged. c. it cannot be connected to a material that conducts. d. it must be attached to a battery.

b

When a capacitor is connected to a source of potential difference, charges accumulate on the plates of the capacitor. The accumulation of charge stops when Select one: a. the charge on the capacitor becomes zero. b. the potential difference between the plates is the same as the source. c. the charge on one plate is equal to the charge on the other plate. d. there is a difference in the amount of charge on the two plates.

b

When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car? Select one: a. centripetal force b. inertia c. centripetal acceleration d. centrifugal force

b

When a current moves through a copper conductor, electrons collide with copper atoms. The result of these collisions is Select one: a. a decrease in voltage. b. an increase in temperature. c. an increase in voltage. d. a decrease in resistance.

b

When a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge? Select one: a. It sharply increases, and then decreases. b. It decreases. c. It increases. d. It remains the same.

b

When an iron rod is inserted into a solenoid coil's center, the magnetic field produced by the current in the loops Select one: a. causes the iron to return to an unmagnetized state. b. causes alignment of the domains in the iron. c. forces the domain in the iron out of alignment. d. causes random orientation of the domains in the iron.

b

When compared in a given time interval with other lightbulbs connected to a 120 V circuit, a 60 W lightbulb Select one: a. converts less electrical energy to heat and light than a 40 W lightbulb. b. converts less electrical energy to heat and light than a 100 W lightbulb. c. converts the same electrical energy to heat and light as a 40 W lightbulb. d. converts more electrical energy to heat and light than a 100 W lightbulb.

b

When comparing the net charge of a charged capacitor with the net charge of the same capacitor when it is uncharged, the net charge is Select one: a. greater in the charged capacitor. b. equal in both capacitors. c. less in the charged capacitor. d. greater or less in the charged capacitor, but never equal.

b

Where should you push on a door to apply the most torque when opening the door? Select one: a. close to the hinges of the door b. far from the hinges of the door c. close to the bottom of the door d. close to the top of the door

b

Which is an example of refraction? Select one: a. Light is bent slightly around corners. b. A fish appears closer to the surface of the water than it really is when observed from a riverbank. c. In a mirror, when you lift your right arm, the left arm of your image is raised. d. A parabolic mirror in a headlight focuses light into a beam.

b

Which is not correct when describing the formation of rainbows? Select one: a. Sunlight is internally reflected on the back side of a raindrop. b. All wavelengths refract at the same angle. c. Sunlight is spread into a spectrum when it enters a spherical raindrop. d. A rainbow is really spherical in nature.

b

Which of the following correctly expresses Kepler's third law? Select one: a. T ~ 1/r b. T^2 ~ r^3 c. T^2 ~ r^2 d. T^3 ~ r^2

b

Which of the following describes what will happen to a light ray incident on a glass-to-air boundary at greater than the critical angle? Select one: a. partial reflection, partial transmission b. total internal reflection c. partial reflection, total transmission d. total external transmission

b

Which of the following devices is always connected in series with a household circuit? Select one: a. air conditioning b. fuse c. lamp d. electric range

b

Which of the following does not affect a material's resistance? Select one: a. the type of material b. Ohm's law c. the length of the material d. the temperature of the material

b

Which of the following is necessary for light to undergo total internal reflection? Select one: a. Light moves from a medium with a lower index of refraction into a medium with a higher index of refraction. b. Light moves from a medium with a higher index of refraction into a medium with a lower index of refraction. c. The angle of incidence is less than the critical angle. d. The internal surface of the medium has a reflective surface like a mirror.

b

Which of the following statements is correct? Select one: a. The farther the force is from the axis of rotation, the harder it is to rotate the object. b. The closer the force is to the axis of rotation, the less torque is produced. c. The closer the force is to the axis of rotation, the easier it is to rotate the object. d. The farther the force is from the axis of rotation, the less torque is produced.

b

Which of the following wires would have the least resistance, assuming that all of the wires have the same cross-sectional area (thickness)? Select one: a. a copper wire 10 cm in length b. a copper wire 5 cm in length c. an iron wire 5 cm in length d. an iron wire 10 cm in length

b

Which of the following would be the best to use to determine whether an electric field is present around an object? Select one: a. a magnetized pin b. a charged table tennis ball c. light from a lamp d. a mass suspended from a spring scale

b

Which statement is correct regarding electric power. Select one: a. Electric power equals the amount of electrical energy converted to other forms of energy. b. Electric power equals the current times potential difference. c. Electric power equals the amount of electrical energy used by a device. d. Electric power equals current times resistance.

b

Which will not increase the energy stored in a capacitor by a factor of sixteen? Select one: a. Increase the capacitance to sixteen times the value. b. Increase the potential difference across the capacitor to sixteen times its previous value. c. Double the potential difference across the capacitor and increase the capacitance by four times. d. Increase the potential difference across the capacitor to four times its previous value.

b

A battery is a device that maintains a potential difference between two Select one: a. light bulbs. b. chemicals. c. terminals. d. charges.

c

A circuit is constructed as follows: four resistors in parallel connected in series with three resistors in parallel connected in series with two resistors in parallel. All of the resistors have the same value. How does the equivalent resistance of this circuit compare to the resistance of a single resistor? Select one: a. The equivalent resistance is less than a single resistor. b. The equivalent resistance is the same as a single resistor. c. The equivalent resistance is greater than a single resistor. d. The equivalent resistance cannot be determined without the resistance value of a single resistor.

c

A current in a long, straight wire produces a magnetic field. These magnetic field lines Select one: a. come in from infinity to the wire. b. form circles that pass through the wire. c. form circles that go around the wire. d. radiate out from the wire to infinity.

c

A flashlight bulb with a potential difference of 4.5 V across it has a resistance of 8.0 Ω. How much current is in the bulb filament? Select one: a. 1.8 A b. 9.4 A c. 0.56 A d. 36 A

c

A light ray passing through the center of a thin lens and both of its focal points is Select one: a. refracted. b. called the focal ray. c. not refracted. d. not possible.

c

A lightbulb has a resistance of 240 Ω when operating at 120 V. What is the current in the lightbulb? Select one: a. 1.0 A b. 2.0 A c. 0.50 A d. 0.20 A

c

A mass-spring system can oscillate with simple harmonic motion because a compressed or stretched spring has which kind of energy? Select one: a. kinetic b. gravitational potential c. elastic potential d. mechanical

c

A parallel-plate capacitor has a capacitance of C F. If the area of the plates is doubled while the distance between the plates is halved, the new capacitance will be Select one: a. 2 C b. C / 4 c. 4 C d. C / 2

c

Atmospheric refraction of light rays is responsible for which of the following effects? Select one: a. chromatic aberration b. spherical aberration c. mirages d. total internal reflection in a gemstone

c

Because household devices are connected in parallel in a circuit, ____________ as new devices are connected. Select one: a. the power dissipated in the circuit decrease b. the resistance of the circuit increases c. the potential difference remains the same d. the current does not increase

c

Both insulators and conductors can be charged by Select one: a. polarization. b. grounding. c. contact. d. induction.

c

Capacitors are devices that store energy. The energy stored in a capacitor is equal to the Select one: a. capacitance of the capacitor. b. charge on the plates of the capacitor. c. work required to place the charge on the plates of the capacitor. d. difference in potential energy between the plates of the capacitor.

c

Charge buildup between the plates of a capacitor stops when Select one: a. unequal amounts of charge accumulate on the plates. b. there is no net charge on the plates. c. the potential difference between the plates is equal to the applied potential difference. d. the charge on both plates is the same.

c

Consider two long, straight, parallel wires, each carrying a current I. If the currents move in opposite directions, Select one: a. neither wire will exert a force on the other. b. the two wires will exert a torque on each other. c. the two wires will repel each other. d. the two wires will attract each other.

c

Electric potential Select one: a. depends on the charge at the point where it is measured. b. is measured in joules. c. measures energy per unit charge. d. is the same as electrical potential energy.

c

Electrical appliances have labels that state the power used by the appliance. What does the power rating listed on the label represent? Select one: a. the amount of current the appliance uses b. the amount of electrical energy converted to heat or light by the appliance c. the amount of energy converted each second into other forms of energy d. how quickly the appliance heats up

c

Electrical current in which there is no net motion of the charge carriers is Select one: a. static current. b. direct current. c. alternating current. d. static electricity.

c

Five resistors are wired in a series circuit. How does the equivalent resistance of the circuit compare to the resistances of the individual resistors? Select one: a. The equivalent resistance is the same as any single resistance. b. The equivalent resistance is one-fifth the value of any single resistance. c. The equivalent resistance is greater than any single resistance. d. The equivalent resistance is less than any single resistance.

c

How would the period of an object in a circular orbit change if the radius of the orbit doubled? Select one: a. The period would decrease by a factor of 2(2)^1/2. b. The period would decrease by a factor of 4. c. The period would increase by a factor of 2(2)^1/2. d. The period would increase by a factor of 2.

c

If a light source is emitting electric fields that are oscillating in random directions, the light is said to be Select one: a. polarized. b. diffused. c. unpolarized. d. scattered.

c

If a positively charged glass rod is used to charge a metal bar by induction, the charge on the bar Select one: a. must be positive. b. will be greater in magnitude than the charge on the glass rod. c. must be negative. d. will be equal in magnitude to the charge on the glass rod.

c

If an incident light ray strikes a transparent medium parallel to the normal, then refraction Select one: a. depends on the speed of the light in that medium. b. is at its maximum. c. does not occur. d. None of these.

c

If the potential difference across a pair of batteries used to power a flashlight is 6.0 V, what is the potential difference across the flashlight bulb? Select one: a. 9.0 V b. 12 V c. 6.0 V d. 3.0 V

c

If the potential difference across the bulb in a camping lantern is 9.0 V, what is the potential difference across the battery used to power it? Select one: a. 3.0 V b. 18 V c. 9.0 V d. 1.0 V

c

If you lift an apple from the ground to some point above the ground, the gravitational potential energy in the system increases. This potential energy is stored in Select one: a. both the apple and Earth. b. Earth. c. the gravitational field between Earth and the apple. d. the apple.

c

If you looked at a light through the lenses from two polarizing sunglasses that were overlapped at right angles to each other, Select one: a. all of the light would pass through. b. little of the light would pass through. c. none of the light would pass through. d. most of the light would pass through.

c

In a conductor that carries a current, the drift speed of an electron is Select one: a. greater than the average speed of the electron between collisions. b. equal to the average speed of the electron between collisions. c. less than the average speed of the electron between collisions. d. approximately equal to the speed of light.

c

In how many directions is light reflected from a smooth surface? Select one: a. infinite b. two c. one d. multiple

c

In the circuit shown below, which resistors, if any, have equal voltages across them? The bottom row of resistors should read R^d, R^e and R^f from left to right. https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/43302/6/1812/Capture.JPG Select one: a. R^b, R^e, and R^f b. R^e and R^f c. R^a and R^d d. R^a, R^b, and R^c

c

In which of the following situations is refraction observed? Select one: a. the virtual image of a plane mirror b. polarized light from a car's hood c. light entering a pool of water d. a real image formed by a concave mirror

c

Increasing the potential difference between the plates of a capacitor will produce what effect on the capacitor? Select one: a. It will decrease the charge on each plate. b. It will decrease the capacitance. c. It will increase the charge on each plate. d. It will increase the capacitance.

c

Newton's law of universal gravitation Select one: a. can be derived from Kepler's laws of planetary motion. b. does not apply to Kepler's laws of planetary motion. c. can be used to derive Kepler's third law of planetary motion. d. can be used to disprove Kepler's laws of planetary motion.

c

Object distance, image distance, and radius of curvature are ____ for curved mirrors. Select one: a. independent b. directly related c. interdependent d. unrelated

c

Standing waves are produced by periodic waves of Select one: a. any amplitude and wavelength traveling in opposite directions. b. the same amplitude and wavelength traveling in the same direction. c. the same frequency, amplitude, and wavelength traveling in opposite directions. d. any amplitude and wavelength traveling in the same direction.

c

The ____ of light can change when light is refracted because the medium changes. Select one: a. frequency b. medium c. wavelength d. transparency

c

The ____ of light can change when light is refracted because the velocity changes. Select one: a. frequency b. transparency c. wavelength d. medium

c

The current of a non-ohmic material is plotted against the applied potential. How would you describe the resulting graph? Select one: a. The graph will have a constant negative slope. b. The graph will have a variable negative slope. c. The graph will have a variable positive slope. d. The graph will have a constant positive slope.

c

The electric field just outside a charged conductor in electrostatic equilibrium is Select one: a. at its minimum level. b. zero. c. perpendicular to the conductor's surface. d. the same as it is in the center of the conductor.

c

The force that Earth exerts on the moon Select one: a. causes tides. b. is less than the force the moon exerts on Earth. c. is equal in magnitude to the force the moon exerts on Earth. d. is greater than the force the moon exerts on Earth.

c

The nucleus of an atom has _____________ electric charge. Select one: a. a negative b. both positive or negative c. a positive d. a neutral

c

The power ratings on lightbulbs are measures of the Select one: a. voltage they require. b. amount of negative charge passing through them. c. rate that they give off heat and light. d. density of the charge carriers.

c

The relative distribution of charge density on the surface of a conducting solid depends upon which of the following? Select one: a. the mass density of the conductor b. the type of metal the conductor is made of c. the shape of the conductor d. the strength of Earth's gravitational field

c

The resulting magnification (M) of an image formed by a converging lens is 3.0. Therefore, the object is_________ that of the image. Select one: a. nine times b. one-ninth c. one-third d. three times

c

The speed of an object orbiting another object depends on Select one: a. only the mass of the orbiting object. b. the masses of each object and the distance between them. c. the mass of the object being orbited and the distance between the objects. d. only the mass of the object being orbited.

c

Two charged objects are near each other. One has a charge of -2.0 x 10-5 C and the other has a charge of -4.0 x 10-5 C. If the first charge doubles to -4.0 x 10-5 C, and the second charge doubles to -8.0 x 10-5 C, the force between the charges changes by a factor of Select one: a. 16 b. 2 c. 4 d. No change occurs

c

Two resistors with values of 6.0 Ω and 12 Ω are connected in parallel. This combination is connected in series with a 4.0 Ω resistor. What is the equivalent resistance (Ω ) of this combination? Select one: a. 2.0 b. 0.50 c. 8.0 d. 22

c

What does mechanical advantage measure? Select one: a. the ratio of work input to work output b. the ratio of input force to output force c. the ratio of output force to input force d. the ratio of work output to work input

c

What effect will be produced on a capacitor if the separation between the plates is increased? Select one: a. It will increase the charge. b. It will increase the capacitance. c. It will decrease the capacitance. d. It will decrease the charge.

c

What is the centripetal force that holds planets in orbit? Select one: a. planetary force b. inertia c. gravitational force d. Kepler's force

c

What is the energy possessed by a charge due to its position in an electric field? Select one: a. electrical potential difference b. electrical mechanical energy c. electrical potential energy d. electrical kinetic energy

c

What is the speed of an object in circular motion called? Select one: a. inertial speed b. circular speed c. tangential speed d. centripetal speed

c

What is the term for the net force directed toward the center of an object's circular path? Select one: a. orbital force b. centrifugal force c. centripetal force d. circular force

c

What term describes a force that causes an object to move in a circular path? Select one: a. circular force b. centripetal acceleration c. centripetal force d. centrifugal force

c

What type of image is formed when rays of light actually intersect? Select one: a. virtual b. curved c. real d. projected

c

When a person holds a ball above Earth's surface, the system contains gravitational potential energy. Where is this potential energy stored? Select one: a. in the person holding the ball b. in the ball c. in the gravitational field between Earth and the ball d. inside Earth

c

When an astronaut in orbit experiences apparent weightlessness, Select one: a. the net gravitational force on the astronaut is zero. b. no forces act on the astronaut. c. the net gravitational force on the astronaut is not balanced by a normal force. d. no gravitational forces act on the astronaut.

c

When white light passes through a prism, what color is bent most? Select one: a. All colors are bent the same amount. b. green c. violet d. red

c

When you flip a switch to turn on a light, the delay time before the light turns on is determined by Select one: a. the drift speed of the electrons in the wire. b. the number of electron collisions per second in the wire. c. the speed of the electric field moving in the wire. d. the resistance of the wire.

c

Where is the magnitude of the magnetic field around a permanent magnet greatest? Select one: a. The magnitude is greatest far from the poles. b. The magnitude is equal at all points on the field. c. The magnitude is greatest close to the poles. d. The magnitude is greatest halfway between poles.

c

Which of the following is not true for both gravitational and electric forces? Select one: a. The inverse square distance law applies. b. Potential energy is a function of distance of separation. c. Forces are either attractive or repulsive. d. Forces are proportional to physical properties.

c

Which of the following statements about magnetic field lines is not true? Select one: a. Magnetic field lines have no beginning or end. b. Magnetic field lines appear to begin at the north pole of a magnet. c. Magnetic field lines form open or closed loops. d. Magnetic field lines appear to end at the south pole of a magnet.

c

Which of the following statements about the magnetic field lines of a solenoid is not true? Select one: a. The field lines inside a solenoid point in the same direction and are nearly parallel. b. The field lines outside a solenoid do not always point in the same direction. c. The field lines outside a solenoid are uniformly spaced but further apart. d. The field lines inside a solenoid are uniformly spaced and close together.

c

Which of the following statements about the magnetic field, B, around a current-carrying wire is not true? Select one: a. B is proportional to the current in the wire. b. B is inversely proportional to the distance from the wire. c. B is independent of the current in the wire. d. The lines of B form concentric circles about the wire.

c

Which of the following statements correctly describes the behavior of magnets? Select one: a. Both like and unlike poles can attract and repel each other depending on the surrounding materials. b. Like poles attract each other, and unlike poles repel each other. c. Like poles repel each other, and unlike poles attract each other. d. none of these

c

Which of the following terms correctly describes the shape of the magnetic field around a long, straight current-carrying wire? Select one: a. elliptical b. parallel c. cylindrical d. perpendicular

c

Which of the following wires would have the greatest resistance? Select one: a. an aluminum wire 5 cm in length and 3 cm in diameter b. an aluminum wire 10 cm in length and 5 cm in diameter c. an aluminum wire 10 cm in length and 3 cm in diameter d. an aluminum wire 5 cm in length and 5 cm in diameter

c

Which of the following wires would have the least resistance? Select one: a. a copper wire 10 cm in length at 10°C b. a copper wire 5 cm in length at 32°C c. a copper wire 5 cm in length at 10°C d. a copper wire 10 cm in length at 32°C

c

Which portion of the electromagnetic spectrum is used in a microscope? Select one: a. gamma rays b. ultraviolet light c. visible light d. infrared waves

c

Which sentence best describes electrical conductors? Select one: a. Electrical conductors have low mass density. b. Electrical conductors have high tensile strength. c. Electrical conductors have electric charges that move freely. d. Electrical conductors are poor heat conductors.

c

Which set of information will allow you to calculate the kilowatt•hr usage? Select one: a. the voltage and current in the circuit b. the voltage and the resistance of the circuit c. the resistance, the current, and the time the circuit operates d. the current and the time the circuit operates

c

Which statement describes Earth's magnetic declination? Select one: a. the angle between Earth's magnetic field and Earth's surface b. Earth's magnetic field strength at the equator c. the angle between true north and north indicated by a compass d. the tendency for Earth's field to reverse itself

c

Why does an astronaut weigh less on the moon than on Earth? Select one: a. The astronaut is farther from Earth's center when he or she is on the moon. b. The astronaut is continually in free fall because the moon orbits Earth. c. The gravitational field strength is less on the moon's surface than on Earth's surface. d. The astronaut has less mass on the moon.

c

You have three 100 Ω resistors available. How would you connect these three resistors to produce a 150 Ω equivalent resistance? You must use all of the resistors. Select one: a. Connect all three resistors in series. b. Connect two resistors in series with the third resistor in parallel to the first two. c. Connect one resistor in series with two resistors in parallel. d. Connect all three resistors in parallel.

c

A battery is used to supply power to a cell phone. If the terminal voltage across the battery is 4.5 V, what is the potential difference across the cell phone? Select one: a. 1.5 V b. 9.0 V c. 13.5 V d. 4.5 V

d

A centripetal force acts Select one: a. perpendicular to the plane of circular motion. b. in the same direction as tangential speed. c. in the direction opposite tangential speed. d. perpendicular to tangential speed but in the same plane.

d

A circuit is composed of resistors wired in series. What is the relationship between the equivalent resistance of the circuit and the resistance of the individual resistors? Select one: a. The equivalent resistance is greater than the sum of all the resistances in the circuit. b. The equivalent resistance is less than the smallest resistance in the circuit. c. The equivalent resistance is equal to the largest resistance in the circuit. d. The equivalent resistance is equal to the sum of the individual resistances.

d

A conductor that is in electrostatic equilibrium has an electric field inside the conductor that Select one: a. is parallel to the surface of the conductor. b. depends on the radius of the conductor. c. is greatest near the conductor's surface. d. is zero.

d

A high-voltage transmission line carries 1000 A at 700 000 V. What is the maximum power carried in the line? Select one: a. 4 x 10^8 W b. 7 x 10^7 W c. 1 x 10^8 W d. 7 x 10^8 W

d

A load in a circuit Select one: a. is a source of potential difference. b. creates electrical energy. c. opens and closes the circuit. d. dissipates energy.

d

A student rubs a certain rod with plastic wrap. The rod then repels a glass rod that has been rubbed with silk and attracts a rubber rod that has been rubbed with fur. This observation shows that the first rod has aNo __________ charge. Select one: a. neutral b. negative c. undetermined d. positive

d

All of the following statements about electromagnetic waves are true except which one? Select one: a. Electromagnetic waves move in a direction that is perpendicular to the electric and magnetic fields. b. Electromagnetic waves are transverse waves. c. Electromagnetic waves are composed of oscillating electric and magnetic fields. d. Electromagnetic waves are distinguished by their different shapes.

d

All of the following statements about magnetic field lines around a permanent magnet are true except which one? Select one: a. Magnetic field lines always form a closed loop. b. In a permanent magnet, the field lines actually continue within the magnet itself. c. Magnetic field lines have no beginning or end. d. Magnetic field lines appear to end at the north pole of a magnet.

d

An electric force F exists between two objects separated from each other by distance r. If the distance is decreased to 0.5r, the force between the two objects becomes Select one: a. 1/2 F b. 2F c. 1/4 F d. 4F

d

An object is located in front of a concave spherical mirror between the center of curvature (C) and the focal point (F). Where is the image located? Select one: a. between the focal point and the center of curvature b. between the mirror and the focal point c. behind the mirror d. beyond the center of curvature

d

Electric current in a wire is the Select one: a. net movement of electrical energy through the wire. b. number of electric charges moving from one location to another in the wire. c. rate at which electrical energy is used to move charges through the wire. d. rate at which electric charges move through an area of the wire.

d

For a conductor that is in electrostatic equilibrium, any excess charge Select one: a. flows to the ground. b. resides entirely on the conductor's interior. c. resides entirely in the center of the conductor. d. resides entirely on the conductor's outer surface.

d

How does the net charge on a charged capacitor differ from the net charge on an uncharged capacitor? Select one: a. The charged capacitor has a greater positive charge than the uncharged capacitor. b. There is a net charge on the charged capacitor, but there is no net charge on the uncharged capacitor. c. The net charge on the charged capacitor is greater than on the uncharged capacitor. d. The net charge on both capacitors is the same.

d

How is the direction of a magnetic field, B, defined at any location? Select one: a. the direction toward which the south pole of a compass needle points b. the direction that is parallel to the imaginary magnetic field lines c. the direction that is perpendicular to Earth's magnetic field d. the direction toward which the north pole of a compass needle points

d

If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed? Select one: a. Both would be later. b. Sunrise would be earlier, and sunset would be later. c. Both would be earlier. d. Sunrise would be later, and sunset would be earlier.

d

If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player? Select one: a. 4.0 V b. 3.0 V c. 6.0 V d. 12 V

d

If the current through a 500. W heater is 4.00 A, what is the potential difference across the ends of the heating element? Select one: a. 0.008 V b. 150. V c. 2000. V d. 125 V

d

If you were to stand on a bathroom scale in an elevator that is accelerating downward, the bathroom scale would measure Select one: a. your weight. b. the force due to gravity between you and Earth. c. your mass. d. the normal force between you and the scale.

d

In a charged conductor, such as an aluminum rod, the charge is Select one: a. distributed along a line through the center of the rod. b. in the exact center of the rod. c. distributed throughout the rod. d. on the surface of the rod.

d

In a vacuum, electromagnetic radiation of short wavelengths Select one: a. travels slower than radiation of long wavelengths. b. can travel both faster and slower than radiation of long wavelengths. c. travels faster than radiation of long wavelengths. d. travels as fast as radiation of long wavelengths.

d

Kepler developed his laws of planetary motion as he tried to reconcile Select one: a. Ptolemaic theory with Copernican theory. b. Copernican theory with his own data. c. Ptolemaic theory with Copernicus's data. d. Copernican theory with Tycho Brahe's data.

d

One end of a taut rope is fixed to a post. What type of wave is produced if the free end is quickly raised and lowered one time? Select one: a. periodic wave b. longitudinal wave c. sine wave d. pulse wave

d

Several resistors are wired in a circuit so that there is a single path for the flow of electric current. What type of circuit is this? Select one: a. short circuit b. parallel circuit c. electronic circuit d. series circuit

d

Since more magnetic field lines cross the area that is near the pole of a magnet, what does this indicate about the magnetic field strength in that location? Select one: a. It is weaker. b. It is entering the magnet. c. It is leaving the magnet. d. It is stronger.

d

Six resistors are wired in a parallel circuit. What is the voltage across each resistor in the circuit if the first resistor is connected to a 24 V battery? Select one: a. Voltage cannot be determined without the resistance values. b. 0.25 V c. 4 V d. 24 V

d

Sound generally travels faster through solids than through gases because the particles (atoms or molecules) of a solid are ___________ than the particles of a gas. Select one: a. heavier b. warmer c. larger d. closer together

d

The electric fields of two charges, A and B, are represented by diagrams showing electric field lines. If charge B is greater than charge A, the diagram of charge B will have __________ than the diagram of charge A. Select one: a. longer field lines b. more curved field lines c. straighter field lines d. more lines per unit area

d

The energy provided by a battery connected to a circuit results from Select one: a. the components of the circuit. b. a potential difference. c. an electric field inside the battery. d. a chemical reaction.

d

The equivalent resistance of a complex circuit is usually determined by Select one: a. dividing the sum of the individual resistances by the number of resistances. b. inspection. c. adding and subtracting individual resistances. d. simplifying the circuit into groups of series and parallel circuits.

d

The index of refraction is the ratio of Select one: a. the wavelength of light versus the frequency of light. b. the wavelength of light versus the speed of light in a vacuum. c. the frequency of light versus the speed of light in a medium. d. the speed of light in a vacuum versus the speed of light in a medium.

d

The intensity of light depends on the Select one: a. distance from the light source and the type of surface the light strikes. b. speed of the light wave and the amount of light energy emitted from a source. c. size of the surface area which the light strikes and the distance from the light source. d. amount of light energy emitted from a source and the distance from the light source.

d

The normal to the surface is drawn _____________ to the surface. Select one: a. tangential b. parallel c. 45 degrees to the surface d. perpendicular

d

The phenomenon called I^2 R loss is also known as Select one: a. ohmic energy. b. resistance. c. alternating current loss. d. joule heating.

d

The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called Select one: a. neutralization. b. contact charging. c. polarization d. induction.

d

The right-hand rule states that the thumb of the right hand is to be placed in what direction when grasping a wire? Select one: a. in a direction opposite of the current b. none of these c. in the direction of Earth's magnetic north pole d. in the direction of the current

d

The size and location of an image formed by a converging lens depends on the Select one: a. location of the observer in relation to the lens. b. location of the image in relation to the lens. c. All of these d. location of the object in relation to the lens.

d

The speed at which an electron moves in an electric field in a conductor is the Select one: a. average collision speed. b. speed of light. c. average electron speed. d. drift velocity.

d

The strength of a solenoid can be increased by Select one: a. increasing the number of wire loops. b. increasing the current. c. inserting an iron rod through the center of the coil. d. all of these

d

The strength of an electric field around a charged object depends on both the magnitude of the charge and Select one: a. the sign of the object's charge. b. the volume of space around the object. c. the magnitude of a test charge. d. the distance from the object.

d

Three resistors connected in series carry currents labeled I^1, I^2, and I^3, respectively. Which of the following expresses the total current, It, in the system made up of the three resistors in series? Select one: a. It = (1/I^1 + 1/I^2 + 1/I^3) b. It = (1/I^1 + 1/I^2 + 1/I^3) c. It = I^1 + I^2 + I^3 d. It = I^1 = I^2 = I^3

d

Tides are caused by Select one: a. differences in Earth's gravitational field strength at different points on Earth's surface. b. fluctuations in the gravitational attraction between Earth and the sun. c. differences in the gravitational force of the sun at different points on Earth. d. differences in the gravitational force of the moon at different points on Earth.

d

To find the current in a complex circuit, it is necessary to know the Select one: a. number of branches in the circuit. b. potential difference in each device in the circuit. c. current in each device in the circuit. d. equivalent resistance of the circuit.

d

Two positive charges, A and B, are separated by a distance. The electric potential at the position of charge A depends on Select one: a. the magnitude of charge A and the distance to charge B. b. the magnitudes of both charges and the distance between them. c. the magnitude of charge B and the distance to charge A. d. the magnitude of charge B.

d

Under which of the following conditions is the net magnetic force on a charged particle equal to zero? Select one: a. when the particle is not charged b. when the particle is moving parallel to the magnetic field c. when the particle is stationary d. all of these

d

Until the middle of the 16th century, most people believed ____ was at the center of the universe. Select one: a. the moon b. a black hole c. the sun d. Earth

d

Using a machine can allow you to Select one: a. decrease both the input force and input distance required to do work. b. do less work to perform a given task. c. increase both the input force and input distance required to do work. d. use less force to do a given amount of work.

d

What is capacitance? Select one: a. stored electrical energy b. the amount of charge stored on a conductor c. the ability to store charge on the plates of a capacitor d. the ability to store energy as separated charges

d

What is the potential difference across a 5.0 ohm (Ω ) resistor that carries a current of 5.0 A? Select one: a. 10. V b. 100. V c. 1.0 V d. 25. V

d

What is used in order to predict the location of an image? Select one: a. ray diagrams b. the law of reflection c. simple geometry d. all of these

d

What type of image does a converging lens produce? Select one: a. virtual b. real c. none of these d. real or virtual

d

When a charged body is brought close to an uncharged body without touching it, a ____ charge may result on the uncharged body. When a charged body is brought into contact with an uncharged body and then is removed, a ____ charge may result on the uncharged body. Select one: a. negative; positive b. positive; negative c. residual; induced d. induced; residual

d

When electrons move through a metal conductor, Select one: a. the temperature of the conductor decreases. b. they move in a straight line through the conductor. c. they move at the speed of light in a vacuum. d. they move in zigzag patterns because of repeated collisions with the vibrating metal atoms.

d

When two mechanical waves coincide, the amplitude of the resultant wave is always ____ the amplitudes of each wave alone. Select one: a. the same as b. less than c. greater than d. the sum of

d

When two parallel mirrors are placed so that their reflective sides face each other, ____ images form. This is because the image in one mirror becomes the ____ for the other mirror. Select one: a. reduced, virtual image b. inverted, center of curvature c. enlarged, focal point d. multiple, object

d

Where should a force be applied on a lever arm to produce the most torque? Select one: a. in the middle of the lever arm b. It doesn't matter where the force is applied. c. closest to the axis of rotation d. farthest from the axis of rotation

d

Which best describes the image of a concave mirror when the object's distance from the mirror is less than the focal-point distance? Select one: a. real, inverted, and magnification greater than one b. real, inverted, and magnification less than one c. virtual, upright, and magnification less than one d. virtual, upright, and magnification greater than one

d

Which is the most correct statement regarding the drawing of electric field lines? Select one: a. Electric field lines can start on a charge of either polarity. b. Electric field lines always form closed loops. c. Electric field lines always connect from one charge to another. d. Electric field lines never cross each other.

d

Which of the following best describes the image produced by a flat mirror? Select one: a. real, inverted, and magnification less than one b. virtual, inverted, and magnification greater than one c. real, upright, and magnification equal to one d. virtual, upright, and magnification equal to one

d

Which of the following is due to inertia? Select one: a. A ball whirled in a circular motion stays in one plane. b. A ball whirled in a circular motion experiences a centripetal force directed toward the center of motion. c. A ball whirled in a circular motion experiences centripetal acceleration directed toward the center of motion. d. A ball whirled in a circular motion will move off in a straight line if the string breaks.

d

Which of the following is the best description of a schematic diagram? Select one: a. shows some of the parts that make up a circuit b. determines the location of the parts of a circuit c. uses pictures to represent the parts of a circuit d. shows the parts of a circuit and how the parts connect to each other

d

Which of the following modifications to a solenoid would be most likely to decrease the strength of its magnetic field? Select one: a. removing its iron rod core and increasing the number of coils b. increasing the current and reducing the number of coils c. reducing the number of coils and inserting an iron core d. decreasing the current and reducing the number of coils

d

Which of the following statements about magnetic fields, B, is not true? Select one: a. Magnetic fields have both magnitude and direction. b. Magnetic fields are regions in which magnetic forces can be detected. c. Magnetic fields are vector quantities. d. Magnetic field strength increases as the distance from the magnetic source increases.

d

Which statement is the most correct regarding electric insulators? Select one: a. Electric insulators are good heat conductors. b. Electric insulators have high tensile strength. c. Electric charges move freely in electric insulators. d. Charges within electric insulators do not readily move.

d

Which will increase the capacitance of a capacitor to four times its previous value? Select one: a. Reduce the plate spacing by one-half. b. Increase the area of one plate to four times its previous value. c. Double the area of both plates. d. Double the area of both plates and reduce the plate spacing by one-half.

d

Wrench A is 12 cm long and wrench B is 24 cm long. For a given input force, how does the maximum torque of wrench A compare to the maximum torque of wrench B? Select one: a. 2 times as great b. 1/4 as great c. the same d. 1/2 as great

d

he diagram below represents an array of point charges of the magnitudes shown. Assume that no net force acts on charge q3. What can you say about the sign and magnitude of charge q3? q1 <----------> q3 <----------> q2 1 m 1 m q1 = -6 x 10-9 C q2 = -6 x 10-9 C q3 = ? Select one: a. The charge must be positive and less than the charge on q1 and q2. b. The charge must be positive and the same as the charge on q1 and q2. c. The charge must be negative and the same as the charge on q1 and q2. d. The charge can have any sign and any magnitude.

d

https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/35938/12/1308/Capture.JPG The figure shown above demonstrates charging by Select one: a. contact. b. grounding. c. induction. d. polarization.

d

https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/43314/2/1938/Capture.JPG What happens when the switch is closed in the circuit shown above? Select one: a. The lamp lights because current from the battery flows through the lamp. b. Current from the battery is carried through the resistor. c. Current from the battery is carried through both the lamp and the resistor. d. The lamp goes out, because the battery terminals connect to each other.

d

Evidence confirms that gravitational mass Select one: a. equals inertial mass. b. depends on gravitational field strength. c. depends on free-fall acceleration. d. varies with location.

a

If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because Select one: a. all wavelengths travel at the same speed. b. the speed of light varies for each form. c. wavelength and frequency are equal. d. the speed of light increases as wavelength increases.

a

If you stand 3.0 m in front of a flat mirror, how far away from you would your image be in the mirror? Select one: a. 6.0 m b. 12.0 m c. 1.5 m d. 3.0 m

a

If you want to open a swinging door with the least amount of force, where should you push on the door? Select one: a. as far from the hinges as possible b. It does not matter where you push. c. in the middle d. close to the hinges

a

In a magnetized substance, the domains Select one: a. line up mainly in one direction. b. can never be reoriented. c. cancel each other. d. are randomly oriented.

a

In alternating current, the charge carriers move Select one: a. repeatedly in one direction then in the opposite direction. b. from a lower to a higher electric potential. c. in all directions. d. in only one direction.

a

Objects become electrically charged as a result of the transfer of Select one: a. electrons. b. neutrons. c. protons. d. nuclei.

a

One ampere of current is the movement of ______________through a given area in one second. Select one: a. one coulomb of charge b. one joule of energy c. one volt of potential difference d. one electron

a

Part of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil that extends out of the water. What is this phenomenon called? Select one: a. refraction b. diffraction c. interference d. reflection

a

Potential difference is Select one: a. the ratio of the change in potential energy to the magnitude of a charge. b. the ratio of the magnitude of a charge to its change in potential energy. c. inversely proportional to change in electrical potential energy. d. the measure of the electrical potential energy of a charge.

a

Robert Millikan's research showed that electric charge is quantized, which means that Select one: a. all charge is an integer multiple of a fundamental charge. b. a proton has a charge equal to that of two electrons. c. all charge is an integer multiple of the charge of a neutron. d. an electron can have any amount of electric charge.

a

Rubbing a balloon through dry hair gives the balloon a_____________ electric charge. Select one: a. negative b. positive c. balanced d. neutral

a

Two mechanical waves that have positive displacements from the equilibrium position meet and coincide. What kind of interference occurs? Select one: a. constructive b. none c. destructive d. complete destructive

a

Two resistors having the same resistance value are wired in parallel. How does the equivalent resistance compare to the resistance value of a single resistor? Select one: a. The equivalent resistance is half the value of a single resistor. b. The equivalent resistance is twice the value of a single resistor. c. The equivalent resistance is greater than that of a single resistor. d. The equivalent resistance is the same as a single resistor.

a

Uncharged objects can be attracted by a charged object because the uncharged objects acquire a surface charge by the process of Select one: a. polarization. b. conduction. c. contact. d. charge transfer.

a

When red light and green light shine on the same place on a piece of white paper, the spot appears to be Select one: a. yellow. b. white. c. black. d. brown.

a

Which variable in the wave speed equation is constant in a vacuum? Select one: a. f b. c c. all of these d. λ

b

A capacitor consists of two metal plates; ____ is stored on one plate, and ____ is stored on the other. Select one: a. residual charge, induced charge b. potential energy, kinetic energy c. negative charge, positive charge d. potential difference, internal resistance

c

A student sends a pulse traveling on a taut rope with one end attached to a post. What will the student observe? Select one: a. The pulse will be reflected and inverted if the rope is free to slide up and down on the post. b. The pulse will not be inverted if the rope is fixed to the post. c. The pulse will be reflected and inverted if the rope is fixed to the post. d. The pulse will not be reflected if the rope is free to slide up and down on the post.

c

All of the following images can be formed by a converging lens except which one? Select one: a. virtual, upright, and magnified b. real, inverted, and magnified c. real, upright, and magnified d. real and point

c

All of the following statements about real and virtual images are true except which one? Select one: a. Real images can be projected onto a screen; virtual images cannot. b. Virtual images form at a point from which light rays appear to come but do not actually come. c. Both converging and diverging lenses form real images. d. A real image is formed when light rays intersect.

c

Electric field strength depends on Select one: a. charge and mass. b. elementary charge and radius. c. charge and distance. d. Coulomb constant and mass.

c

Kepler's laws of planetary motion reconciled Select one: a. Ptolemaic theory with Copernicus' data. b. Ptolemaic theory with Copernican theory. c. Copernican theory with Tycho Brahe's data. d. Copernican theory with Newton's law of universal gravitation.

c

Waves arriving at a free boundary are Select one: a. reflected and inverted. b. inverted but not reflected. c. reflected but not inverted. d. neither reflected nor inverted.

c

Sound waves from a vibrating source travel Select one: a. back and forth. b. in two directions. c. in one direction. d. in all directions.

d

Which of the following colors of light would bend the most when entering a refracting medium? Select one: a. green b. yellow c. red d. blue

d

Which of the following statements about the orientation and effects of Earth's magnetic field is not true? Select one: a. A compass needle that can rotate both perpendicularly and parallel to the surface of Earth, points down at the magnetic south pole. b. The geographic South Pole of Earth corresponds to the magnetic north pole. c. A compass needle always indicates the direction of true north. d. The geographic North Pole of Earth is near the magnetic south pole.

d

Which of the following units is used to state the strength of an electric field? Select one: a. coulombs per newton b. coulombs per cubic meter c. meters per coulomb d. newtons per coulomb

d

Which of the schematics shown below conducts electricity through the lamp? https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/42803/5/1795/18mc%204.JPG Select one: a. A and B b. B and D c. C and D d. A and C

d

When a glass rod is rubbed with silk and becomes positively charged, Select one: a. electrons are removed from the rod. b. the silk remains neutral. c. protons are added to the silk. d. protons are removed from the silk.

a

Which of the following wires would have the least resistance? Select one: a. an aluminum wire 40 cm in diameter at 40°C b. an aluminum wire 20 cm in diameter at 40°C c. an aluminum wire 20 cm in diameter at 60°C d. an aluminum wire 40 cm in diameter at 60°C

a

Electric power is the rate at which charge carriers Select one: a. collide with atoms. b. do work. c. pass through an area. d. move through a potential difference.

b

A mirage is the result of Select one: a. the subconscious addition of a reflecting pool of water. b. refraction. c. All of these. d. warmer air near the surface of Earth.

c

The image formed by a diverging lens is Select one: a. always upright. b. always virtual. c. All of these. d. always smaller.

c

A parabolic mirror, instead of a spherical mirror, can be used to reduce the occurrence of which effect? Select one: a. spherical aberration b. light scattering c. chromatic aberration d. mirages

a

A positive sign for magnification (M) signifies that the image is Select one: a. upright and virtual b. inverted and real. c. inverted and virtual. d. upright and real.

a

A sound wave consists of a series of Select one: a. compressions and rarefactions. b. longitudes and latitudes. c. perpendicular vibrations d. hills and valleys.

a

A sound wave is an example of a __________wave. Select one: a. longitudinal b. transverse c. crest-and-trough d. electromagnetic

a

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction parallel to the direction of the wave's motion. The wave is Select one: a. longitudinal. b. transverse. c. a pulse. d. electromagnetic.

a

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is Select one: a. transverse. b. a pulse. c. electromagnetic. d. longitudinal.

a

According to the law of reflection, the angle of incidence is __________ the angle of reflection. Select one: a. equal to b. always twice c. greater than d. less than

a

For a flat mirror, object distance ( p) is always ________ image distance (q). Select one: a. equal to b. half the c. greater than d. less than

a

For a spherical mirror, the focal length is equal to the ___________ radius of curvature of the mirror. Select one: a. one-half b. one-fourth c. the square of d. twice

a

For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion? Select one: a. period b. revolution c. frequency d. amplitude

a

For spherical mirrors, how many reference rays are used to find the image point? Select one: a. 3 b. 4 c. 6 d. 2

a

If a light ray strikes a flat mirror at an angle of 27° from the normal, the reflected ray will be Select one: a. 27° from the normal. b. 63° from the normal. c. 90° from the mirror's surface. d. 27° from the mirror's surface.

a

If light passes from glass into air, the ray will Select one: a. bend away from the normal. b. bend toward the normal. c. bend toward or away from the normal depending on the light's wavelength. d. not bend.

a

If the distance from a light source is increased by a factor of 5, the illuminance Select one: a. decreases by a factor of 25. b. increases by a factor of 25. c. also increases by a factor of 5. d. decreases by a factor of 5.

a

In order for refraction to occur, all of the following conditions must be met except which one? Select one: a. Light rays strike the medium parallel to the normal. b. Light travels from one transparent medium to another. c. Light crosses the boundary that separates the media. d. Light rays strike the medium at an angle.

a

Magenta is the complementary color to green. What two primary colors are used to form magenta? Select one: a. red and blue b. red and green c. green and cyan d. green and blue

a

Spherical wave fronts can be treated as parallel lines when Select one: a. they are a large distance from the source. b. the frequency is very high. c. they are very near the source. d. the wavelength is very large.

a

The direction in which electric fields are polarized by transmission Select one: a. all of these. b. is determined by the arrangement of the atoms or molecules in the crystal. c. results in linear polarization. d. occurs along the transmission axis.

a

The superposition of mechanical waves can be observed in the movement of Select one: a. water waves in a ripple tank. b. bumper cars. c. electromagnetic radiation. d. violin bows in an orchestra.

a

Two mechanical waves meet and coincide. One wave has a positive displacement from the equilibrium position, and the other wave has a negative displacement. What kind of interference occurs? Select one: a. destructive b. complete constructive c. constructive d. none

a

What distinguishes a real image from a virtual image? Select one: a. Real images can be displayed on a surface, whereas virtual images cannot. b. Real images can be larger or smaller than the object, whereas virtual images are equal in size to the object. c. Real images are inverted, whereas virtual images are upright. d. Real images are possible with any type of mirror, whereas virtual images only occur with flat mirrors.

a

What type of image is produced by an object that is far from a concave spherical mirror? Select one: a. smaller and upside down b. larger and upright c. smaller and upright d. larger and upside down

a

What type of light reflection occurs when light is reflected from a rough, textured surface? Select one: a. diffuse b. variegated c. diverse d. specular

a

When a light ray passes from a vacuum into a substance with a large index of refraction, the amount of bending experienced by the ray is Select one: a. large b. difficult to measure c. insignificant d. small

a

When parallel rays that are also parallel to the principal axis strike a spherical mirror, rays that strike the mirror ____ the principal axis are focused at the focal point. Those rays that strike the mirror ____ the principal axis are focused at points between the mirror and the focal point. Select one: a. close to, far from b. perpendicular to, far from c. close to, perpendicular to d. far from, close to

a

When red light is compared with violet light, Select one: a. both travel at the same speed. b. both have the same wavelength. c. red light travels faster than violet light. d. both have the same frequency.

a

Which best describes the image of a concave mirror when the object is at a distance greater than twice the focal-point distance from the mirror? Select one: a. real, inverted, and magnification less than one b. virtual, upright, and magnification greater than one c. virtual, upright, and magnification less than one d. real, inverted, and magnification greater than one

a

Which best describes the image of a concave mirror when the object is located somewhere between the focal point and twice the focal-point distance from the mirror? Select one: a. real, inverted, and magnification greater than one b. real, inverted, and magnification less than one c. virtual, upright, and magnification less than one d. virtual, upright, and magnification greater than one

a

Which of the following is a single nonperiodic disturbance? Select one: a. pulse wave b. periodic wave c. transverse wave d. sine wave

a

All of the following descriptions about images formed by convex spherical mirrors are true except which one? Select one: a. They are always virtual. b. They are formed from converging rays. c. They are smaller than the objects from which they are formed. d. Their image distance is always negative.

b

Given the wave speed equation c = fλ, what is the relationship between frequency (f) and wavelength (λ)? Select one: a. exponential b. inverse c. regressive d. direct

b

How many colors of the visible spectrum can the primary colors form? Select one: a. most b. all c. some d. the six elementary colors

b

Red, green, and blue are Select one: a. subtractive primary colors. b. additive primary colors. c. additive pigments. d. subtractive pigments.

b

Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional to Select one: a. a spring constant. b. displacement. c. mass. d. time.

b

Waves arriving at a fixed boundary are Select one: a. inverted but not reflected. b. reflected and inverted. c. neither reflected nor inverted. d. reflected but not inverted.

b

What color of light is produced when a primary color is combined with its complementary color? Select one: a. black b. white c. depends on the ratio of the combination d. a subdued version of the primary color

b

When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and Select one: a. the angle of incidence is greater than the angle of reflection. b. the angles of incidence and reflection are equal. c. the angle of incidence can be greater than or less than the angle of reflection. d. the angle of incidence is less than the angle of reflection.

b

When light moves from a material in which its speed is higher into a material in which its speed is lower, the ray is Select one: a. bent away from the normal. b. bent toward the normal. c. not bent. d. bent toward or away from the normal depending on the light's wavelength.

b

Which of the following factors change as light waves pass from one transparent medium into another? Select one: a. f, v, and λ b. v and λ c. f and λ d. f and v

b

Which of the following is not an additive primary color? Select one: a. red b. yellow c. blue d. green

b

Which of the following statements is not true about the reflection of light? Select one: a. No surface is a perfect reflector. b. Perfect reflectors are common. c. The manner in which light is reflected from a surface depends on the surface's smoothness. d. All substances absorb at least some incoming light and reflect the rest.

b

A highly polished finish on a new car provides a ____ surface for ____ reflection. Select one: a. specular, diffused b. rough, diffused c. smooth, specular d. rough, regular

c

A mass attached to a spring vibrates back and forth. At the equilibrium position, the Select one: a. net force reaches a maximum. b. acceleration reaches a maximum. c. velocity reaches a maximum. d. velocity reaches zero.

c

An object is located in front of a converging lens at a distance that is twice the focal length. All of the following descriptions about the image are true except which one? Select one: a. The image is real. b. The image is the same size as the object. c. The image is upright. d. The image is located behind the converging lens at a distance that is twice the focal length.

c

For a mass hanging from a spring, the maximum displacement the spring is stretched or compressed from its equilibrium position is the system's Select one: a. acceleration. b. frequency. c. amplitude. d. period.

c

For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time? Select one: a. period b. revolution c. frequency d. amplitude

c

How are frequency and period related in simple harmonic motion? Select one: a. They are directly related. b. Their sum is constant. c. They are inversely related. d. Both measure the number of cycles per unit of time.

c

Suppose that two sound waves passing through the same medium have different wavelengths. Which of the following is most likely to be the reason for the differing wavelengths? Select one: a. the type of wave b. differences in amplitude c. differences in frequency d. the nature of the medium

c

Suppose you are on a moving bus as it passes a stationary car in which a stereo is playing music. As the bus goes past the car, you will hear the pitch of the music Select one: a. become lower, then higher. b. become higher. c. become lower. d. remain constant.

c

The farther light is from a source, Select one: a. the more light is available per unit area. b. the more condensed light becomes. c. the more spread out light becomes. d. the more bright light becomes.

c

The image of an object in a flat mirror is always Select one: a. independent of the size of the object. b. larger than the object. c. the same size as the object. d. smaller than the object.

c

The primary pigments are ______________ the primary colors. Select one: a. associated with b. the inverse of c. complementary to d. unrelated to

c

Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moment after the waves meet and coincide? Select one: a. The waves no longer exist. b. The waves reflect and travel backward. c. The waves continue unchanged. d. A single wave continues along the rope.

c

What is the least number of rays needed to locate an image formed by a flat mirror? Select one: a. depends on the object b. four c. two d. one

c

What type of mirror is used whenever a magnified image of an object is needed? Select one: a. concave mirror b. two-way mirror c. convex mirror d. flat mirror

c

When the reflection of an object is seen in a flat mirror, the distance from the mirror to the image depends on Select one: a. the size of the object. b. the wavelength of light used for viewing. c. the distance from the object to the mirror. d. the distance of both the observer and the object to the mirror.

c

When you hear the sound from a vehicle that is moving toward you, the pitch is higher than it would be if the vehicle were stationary. The pitch sounds higher because the Select one: a. amplitude of the sound waves increases. b. wavelength of the sound waves becomes greater. c. sound waves arrive more frequently. d. sound from the approaching vehicle travels faster.

c

Which of the following is not a primary subtractive color? Select one: a. magenta b. cyan c. blue d. yellow

c

Which of the following is not an example of approximate simple harmonic motion? Select one: a. a child swinging on a swing b. a piano wire that has been struck c. a ball bouncing on the floor d. a car's radio antenna waving back and forth

c

The human perception of pitch depends on a sound's Select one: a. amplitude. b. wavelength. c. velocity. d. frequency.

d

The mirror equation and ray diagrams are concepts that are valid only for paraxial rays. What is a paraxial ray? Select one: a. a light ray perpendicular to the principal axis of the mirror b. a light ray very far from the principal axis of the mirror c. a light ray parallel to the principal axis of the mirror d. a light ray very near the principal axis of the mirror

d

The mirror equation and ray diagrams are valid concepts only for what type of rays? Select one: a. parallel rays b. perpendicular rays c. intersecting rays d. paraxial rays

d

Which of the following most affects the wavelength of a mechanical wave moving through a medium? Assume that the frequency of the wave remains constant. Select one: a. the height of a crest b. the energy carried by the wave c. the amplitude d. the nature of the medium

d

Which portion of the electromagnetic spectrum is used to identify fluorescent minerals? Select one: a. gamma rays b. infrared waves c. X rays d. ultraviolet light

d