Spring 2018 Midterm, Exam III, Exam IV
In a double slit experiment, the slit separation is constructed to be exactly 4 times the wavelength of the light passing through the slits. At what angles from the center of the pattern will the third bright fringes on both sides of the central fringe occur? A) +/- 48.6 B) +/- 67.5 C) +/- 36.9 D) +/- 75.0 E) +/- 43.0
A) +/- 48.6
A single slit forms a diffraction pattern, with the first minimum at an angle of 40 degrees from central maximum, using monochromatic light of 490 nm wavelength. What is the width of the slit? A) 762 nm B) 668 C) 731 D) 637 E) 700
A) 762 nm
The principle of equivalence states that A) all physical experiments conducted in a uniform gravitational field and in an accelerated frame of reference give identical results. B) the length of an object depends on its speed relative to a given observer C) the laws of physics are the same in all inertial frames of reference D) clocks that move relative to one another keep time at different rates E) the speed of light is the same in any frame of reference
A) all physical experiments conducted in a uniform gravitational field and in an accelerated frame of reference give identical results.
Increasing the resistance of a voltmeter's series resistance A) allows it to measure a larger voltage at full-scale deflection B) converts it to an ammeter C) allows it to measure a smaller voltage at full-scale deflection D) enables more current to pass through the meter movement at full-scale deflection
A) allows it to measure a larger voltage at full-scale deflection
A star is moving toward the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star? A) c B) 0.9 c C) 1.2 c D) 1.9 E) 1.1c
A) c
A bar magnet is dropped, N pole down, so it falls through a horizontal loop of wire. As it leaves the loop, the induced current (viewed from above) is: A) clockwise B) counterclockwise C) zero
A) clockwise
If the inductance and the capacitance both double in an LRC series circuit, the resonant frequency of that circuit will A) decrease to one half its original value B) increase to 4x its original value C) decrease to 1/4 its original value D) decrease to 1/8 its original value E) increase to twice its original value
A) decrease to one half its original value
Lenz's Law is a consequence of the law of conservation of A) energy B) electric field C) charge D) mass E) momentum
A) energy
Monochromatic light strikes a metal surface and electrons are ejected from the metal. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons? A) greater ejection rate; same max energy B) same eject rate; greater max energy C) same eject rate; same max energy D) greater eject rate; greater max energy
A) greater ejection rate; same max energy
A spaceship is moving in a straight line at a speed of 0.8c (relative to earth). It launches a missile that moves away from the spaceship (traveling in the same direction as the spaceship) at a speed of 0.6 c. Relative to Earth, the speed of the missile is A) greater than 0.8 c and less than c B) greater than c and less than 1.4 c C) c D) 1.4 c
A) greater than 0.8 c and less than c
Which of the following is an accurate statement? A) if a solid metal sphere carries a net charge, the charge will move to the sphere surface B) a conductor cannot carry a net charge C) the electric field at the surface of a conductor is not necessarily perpendicular to the surface in all cases D) if a solid metal sphere carries a net charge, the charge will be uniformly distributed throughout the volume of the sphere
A) if a solid metal sphere carries a net charge, the charge will move to the sphere surface
In a single-slit diffraction experiment, the width of the slit through which light passes is reduced. What happens to the width of the central bright fringe? A) it becomes wider B) it stays the same C) it becomes narrower D) its behavior depends on the wavelength of the light
A) it becomes wider
A circular loop of wire is rotated at constant angular speed about an axis whose direction can be varied. In a region where a uniform magnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induced emf is to be zero? A) it must be vertical B) Any horizontal orientation will do C) It must take an angle of 90 degrees to the direction north D) It must make an angle of 45 degrees to the vertical E) It must make an angle of 45 degrees to the direction North
A) it must be vertical
An astronaut in an inertial reference frame measures a time interval change time between her heartbeats. What will observers in all other inertial reference frames measure for the time interval between her heartbeats? A) more than delta t B) less than delta t C) delta t D) the answer depends on whether they are moving toward her or away from her
A) more than delta t
Suppose a region of space has a uniform electric field, directed toward the right, as shown in the figure. Which statement about the electric potential is true ------------------------------------>E *A ----------------------> *C -----------------------------------> *B A) the potential at points A and B are equal, and the potential at point C is lower than the potential at point A B) the potential at all three locations (A, B, C) is the same because the field is uniform C) the potential at points A and B are equal, and the potential at point C is higher than the potential at point A D) the potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest
A) the potential at points A and B are equal, and the potential at point C is lower than the potential at point A
A beam of red light and a beam of violet light each deliver the same power on a surface. For which beam is the number of photons hitting the surface per second the greatest? A) the red beam B) the violet beam C) it is the same for both beams
A) the red beam
Two parallel straight wires carry currents in the same direction. The magnetic forces between the wires are such that A) the wires attract each other B) the wires repel each other C) they are pulled in the direction of the wires D) the wires feel a clockwise torque
A) the wires attract each other
A vertical wire carries a current straight up in a region where the magnetic field vector points due North. What is the direction of the resulting fore on this current? A) west B) south C) downward D) east E) north
A) west
Alternating current and voltage (AC), rather than direct current and voltage (DC), are used for domestic electrical power. The reason for this is based on one of the following physical principles. Which one? A) when the number of magnetic field lines passing through a circuit changes, a voltage is generated in the circuit B) when a current flows through a resistance, heat is generated C) when a current carrying wire is placed in a magnetic field, it may experience a force if properly oriented D) opposite electric charges attract each other, and like charges repel each other. E) when a current flows through a wire, a magnetic field is created
A) when the number of magnetic field lines passing through a circuit changes, a voltage is generated in the circuit
Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude F due to the other. With time, charge gradually leaks off of both spheres. When each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be A) 1/16 F B) 1/4 F C) 1/8 F D) 1/2 F
B) 1/4 F
One very small uniformly charged plastic ball is located directly above another such charge in a test tube as shown in the figure. The balls are in equilibrium a distance d apart. If the charge on each ball is doubled, the distance between the balls in the test tube would become A) 8d B) 2d C) 4d D) sqrt2d
B) 2d
A light beam from a 2.1 mW He-Ne laser has a wavelength of 633 nm. How many photons does the laser emit in one second? h=6.626 x 10^-34 J*s A) 8.8x10^15 B) 6.7x10^15 C) 1.1x10^16 D) 1.3x10^16
B) 6.7x10^15
When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4 degrees. What is the wavelength of the light? A) 363 nm B) 633 C) 336 D) 752 E) 452
B) 633
A charge Q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of length d. At a point P that is 1.25 cm outside the sheet, the magnitude of the electric field due to the sheet is E. If the sheet is now stretched so that its sides have length 2d, what is the magnitude of the electric field at P? A) E B) E/4 C) 2E D) 4E E) E/2
B) E/4
Observer A sees the ruler moving by in a relativistic train and measures its length to be LA. Observer B moves together with the train and measures the length of the ruler to be LB. These two results will be such that A) LA=LB B) LA<LB C) LA>LB D) LA could be greater or smaller than LB depending on the direction of the motion
B) LA<LB
The three loops of wire shown are all subject to the same uniform magnetic field B that does not vary with time. Loop 1 oscillates back and forth as the bob in a pendulum, loop 2 rotates about a vertical axis, and loop 3 oscillates up and down at the end of a spring. Which loop, loops, will have an induced emf? A) Loop 1 B) Loop 2 C) Loop 3 D) Loops 2 and 3 E) Loops 1 and 3
B) Loop 2
Observer A sees a pendulum oscillating back and forth in a relativistic train and measures its period to be TA. Observer B moves together with the train and measures the period of the pendulum to be TB. These two results will be such that A) TA < TB B) TA > TB C) TA = TB D) TA could be greater or smaller than TB depending on the direction of motion
B) TA > TB
A person buys an SUV and discovers that it is too long to fit in the garage ( the length of the SUV is 1.3 times the length of the garage). He decides to drive the SUV into the garage at a speed of 0.99c. Which statement is true? A) the driver of the SUV sees that the entire SUV is inside the garage prior to it colliding into the back wall, but the person standing near the garage will claim it never was entirely inside. B) a person standing near the garage sees the SUV fit inside the garage prior to it colliding into the back wall of the garage, but the driver will claim that it never was entirely inside. C) both the driver and the person standing near the garage will claim that the SUV was entirely inside the garage prior to the front smashing into the back wall of the garage. D) neither the driver nor the person standing near the garage will claim that the SUV was entirely inside the garage
B) a person standing near the garage sees the SUV fit inside the garage prior to it colliding into the back wall of the garage, but the driver will claim that it never was entirely inside.
An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, and inductor, or a capacitor. At time t=o, the voltage is 0. at time t=t/4, the current in the unknown element is equal to zero, and at time t=t/2 the current is I=-Imax, where Imax is the current amplitude. What is the unknown element? A) an inductor B) capacitor C) inductor or capacitor D) resistor
B) capacitor
A horizontal metal bar rotates at a constant angular velocity w about a vertical axis through one of its ends while in a constant magnetic field B that is directed down. The emf induced between the two ends of the bar is A) variable with a maximum of Bw^2 B) constant and proportional to the product Bw C) constant and proportional to the product Bw^2 D) constant and proportional to the product B^2 w^2 E) variable with a maximum of B w
B) constant and proportional to the product Bw
A light source is flashing on and off with a frequency of 1 Hz. If you were to run really fast (say 80% the speed of light), with your direction of motion perpendicular to the direction of the light, you would observe the frequency of the flashing to: A) remain the same B) decrease C) increase
B) decrease
A charged particle is injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will A) move in a straight line B) follow a spiral path C) move along a parabolic path D) immediately stop E) follow a circular path
B) follow a spiral path
In a transformer, the power input A) can be either larger or smaller than the power output B) is equal to the power output C) is smaller than the power output D) is larger than the power output
B) is equal to the power output
For a proton moving in the direction of the electric field A) its potential energy decreases and its electric potential increases B) its potential energy decreases and its electric potential decreases C) its potential energy increases and its electric potential increases D) both its potential energy and its electric potential remain constant E) Its potential energy increases and its electric potential decreases
B) its potential energy decreases and its electric potential decreases
The long straight wire in the figure carries a current I that is decreasing with time at a constant rate. The circular loops A, B, and C all lie in a plane containing the wire. The induced emf in each of the loops A, B, and C, is such that A) no emf is induced in any of the loops. B) loop a has a counter0clockwise emf, loop B has no induced emf, and loop C has a clockwise emf. C) loop A has a clockwise emf, loop B has no induced emf, and loop C has a counterclockwise emf D) loop A has a counter clockwise emf, loops B and C have clockwise emfs E) a counterclockwise emf is induced in all the loops
B) loop a has a counter0clockwise emf, loop B has no induced emf, and loop C has a clockwise emf.
In a series RLC circuit the total impedance A) equals R + XL + XC B) never is less than R C) always exceeds R D) never exceeds R
B) never is less than R
An equipotential surface must be A) parallel to the electric field at any point B) perpendicular to the electric field at any point C) equal to the electric field at any point D) randomly oriented with respect to the electric field
B) perpendicular to the electric field at any point
The power factor of an RLC circuit is defined as cos theta = R/Z, but the phase angle can also be calculated from A) sin = Z/(XL-XC) B) sin = (XL-XC)/Z C) sin - RZ/ (XL-XC) D) sin = (XL-XC)/RZ
B) sin = (XL-XC)/Z
A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest in the rocket A) the light will reach the front of the rocket after it reaches the back of the rocket B) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket C) the light will reach the front of the rocket before it reaches the back of the pocket
B) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket
Faraday's law of induction states that the emf induced in a loop of wire is proportional to A) current divided by time B) the time variation of the magnetic flux C) the magnetic flux D) the magnetic flux density times the loop's area
B) the time variation of the magnetic flux
Which of the following doesn't have ohm units? A) (XL - XC) B) wC C) (XcXc)/R D) wL E) R
B) wC
Relative to the frame of the observer making the measurement, at what speed parallel to its length is the length of a meterstick 60 cm? A) 0.7c B) 0.9 c C) 0.8 c D) 0.5 c E) 0.6 c
C) 0.8 c
How fast must a proton move so tat its kinetic energy is 80% of its total energy? A) 0.020 c B) 0.8c C) 0.87c D) 0.92 c E) 0.98 c
C) 0.87c
At most, how many bright fringes can be formed on each side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a double slit whose spacing is 1.97x10^-6 m? A) 1 B) 2 C) 3 D) 4 E) 5
C) 3
Light from a monochromatic source shines through a double slit onto a screen 5.0 m away. The slits are 0.180 mm apart. The dark bands on the screen are measured to be 1.70 cm apart. What is the wavelength of the incident light? A) 457 nm B) 784 C) 612 D) 306 E) 392
C) 612
After landing on an unexplored Lingon planet, Spock tests for the direction of the magnetic field by firing a beam of electrons in various directions and by observing the following: Electrons moving upward feel a magnetic force in the NW direction; Electrons moving horizontally North are pushed down; Electrons moving horizontally SE are pushed upward. He naturally concludes that the magnetic field at this landing site is in which direction? A) E B) SE C) SW D) E E) NE
C) SW
When two or more capacitors are connected in parallel to a battery, A) each capacitor carried the same amount of charge B) the equivalent capacitance of the combination is less than the capacitance of any one of the capacitors C) The electric field at the surface of a conductor is not necessarily perpendicular to the surface in all cases D) If a solid metal sphere carries a net charge, the charge will be uniformly distributed throughout the volume of the sphere
C) The electric field at the surface of a conductor is not necessarily perpendicular to the surface in all cases
The figure shows a bar magnet moving vertically upward toward a horizontal coil. The poles of the bar magnets are labeled X and Y. As the bar magnet approaches the coil it induces an electric current in the direction indicated on the figure (counter-clockwise as viewed from above). What are the correct polarities of the magnet? A) both X and Y are north poles B) X is a north pole, Y is a south pole C) X is a south pole, Y is a north pole D) Both x and y are south poles E) the polarities of the magnet cannot be determined from the information given
C) X is a south pole, Y is a north pole
As the frequency of the AC voltage across a capacitor approaches zero, the capacitive reactance of that capacitor: A) approaches unity B) becomes negative C) approaches infinity D) approaches 0
C) approaches infinity
A horizontal wire carries a current straight toward you. From your point of view, the magnetic field caused by thie current A) points to the left B) points directly away from you C) circles the wire in a counter-clockwise direction D) circles the wire in a clockwise direction
C) circles the wire in a counter-clockwise direction
An object of mass M is initially moving at a speed of 0.999c and collides inelastically (they stick) with another identical object that was initially at rest. After the collision, the two objects are moving with a speed A) considerably less than c/2 B) roughly equal to c/2 C) considerably greater than c/2
C) considerably greater than c/2
If the accuracy in measuring the position of a particle increases, the accuracy in measuring its velocity will A) increase B) remain the same C) decrease D) it is impossible to say since the two measurements are independent and do not affect each other
C) decrease
Suppose you have two point charges of opposite sign. As you move them farther and farther apart, the potential energy of this system relative to infinity A) decreases B) stays the same C) increases
C) increases
If the frequency of the AC voltage across an inductor is doubled, the inductive reactance of that inductor A) decreases to 1/4 its original value B) decreases to 1/2 its original value C) increases to twice its original value D) increases to 4 times its original value
C) increases to twice its original value
A 3. ohm resistor is connected in parallel with a 6 ohm resistor. This pair is then connected in series with a 4 ohm resistor. These resistors are connected to a battery. What will happen if the 3 ohm resistor burns out, i.e., becomes an infinite resistance? A) the current in the 4 ohm resistor will drop to zero B) the current provided by the battery will not change C) the current in the 6 ohm resistor will increase D) the power dissipated in the circuit will increase
C) the current in the 6 ohm resistor will increase
In a double-slit experiment, if the slit separation is increased, which of the following happens to the interference pattern shown on the screen? A) the minima stay at the same position B) the maxima stay at the same position C) the minima get closer together D) the minima and maxima stay at the same position E) the maxima get further apart
C) the minima get closer together
A dielectric is inserted between the plates of an isolated parallel-plate capacitor that carries a charge Q. What happens to the potential energy stored in the capacitor? A) the potential energy of the capacitor remains the same B) the potential energy of the capacitor increases C) the potential energy of the capacitor decreases D) the potential energy of the capacitor increases or decreases depending on the value o the dielectric constant of the capacitor E) more information is needed to answer the question
C) the potential energy of the capacitor decreases
A circular metal ring is situated above a long straight wire, as shown in the figure. The straight wire has a current flowing to the right, and the current is increasing in time at a constant rate. Which is true A) there is an induced current in the metal ring, flowing in a counter clockwise direction B) there is no induced current in the metal ring bc the current in the wire is changing at a constant rate C) there is an induced current in the metal ring, flowing in a clockwise direction
C) there is an induced current in the metal ring, flowing in a clockwise direction
A wire lying in the plane of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right? A) zero B) perpendicular to the page and away fro you C) toward the bottom of the page D) perpendicular to the page and toward you e) toward the top of the page
C) toward the bottom of the page
A measurement of an electron's speed is 2.0x10^6 m/s has an uncertainty of 10%. What is the minimum uncertainty in its position? mass of e- = 9.11x10^-31kg A) 0.6 nm B) 0.15 nm C) 0.8 D) 0.29 E) 0.44
D) 0.29
In a certain particle accelerator, a proton has a kinetic energy that is equal to its rest energy. What is the speed of the proton relative to the accelerator? A) 0.5 c B) 0.75 c C) 0.25 c D) 0.87 c E) 0.71 c
D) 0.87 c
An astronaut on a spaceship moving at 0.927 c says that the trip between two stationary stars took 7.49 years. How long does this journey take as measured by someone at rest relative to the two stars? A) 4.05 y B) 22.1 C) 2.81 D) 20 y
D) 20 y
During a nuclear reaction, the particles involved lose 4.8x10^-28 kg of mass. How many joules of energy are released by this reaction? A) 1.4 x 10^-19 J B) 5.3 x 10^-45 C) 1.6 x 10^-36 D) 4.3 x 10^-11 E) 2.1 x 10^-40
D) 4.3 x 10^-11
When two or more capacitors are connected in parallel to a battery, A) each capacitor carries the same amount of charge B) the equivalent capacitance of the combination is less than the capacitance of any one of the capacitors C) the equivalent capacitance of the combination is less than the capacitance of any of the capacitors D) all of the given answers E) none of them
D) all of the given answers
Gaussian surfaces A and B enclose the same positive charge +Q. The area of Gaussian surface A is three times larger than that of Gaussian surface B. The flux of electric field through Gaussian surface A is A) three times smaller than the flux of electric field through Gaussian surface B B) unrelated to the flux of electric field through Gaussian surface B C) nine times larger than the flux of electric field through Gaussian surface B. D) equal to the flux of electric field through Gaussian surface B E) 3x larger than the flux of electric field through Gaussian surface B
D) equal to the flux of electric field through Gaussian surface B
A pure inductor is connected to an AC power supply. In this circuit, the current: A) leads the voltage by 90 degrees B) is in phase with the voltage C) leads the voltage by 45 degrees D) lags the voltage by 90 degrees E) lags the voltage by 45 degrees
D) lags the voltage by 90 degrees
You obtain a 100 W lightbulb and a 50 W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct? A) the 100 W bulb glows brighter than the 50 W bulb B) both bulbs glow at the same increased brightness C) both bulbs glow at the same reduced brightness D) the 50 W bulb glows more brightly than the 100 W bulb
D) the 50 W bulb glows more brightly than the 100 W bulb
In each element of a series LRC circuit A) the currents and voltages are not in phase B) the currents are not in phase C) the currents and voltages are in phase D) the currents are in phase E) the voltages are in phase
D) the currents are in phase
A coil lies flat on a table top in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the sense of the induced current in this coil as the field fades? A) the induced current flows clockwise B there is no induced current in this coil C) the current flows clockwise initially, and then it flows counterclockwise before stopping D) the induced current flows counterclockwise
D) the induced current flows counterclockwise
A lightbulb is plugged into a household outlet, and one of the wires leading to it is wound into a coil. Now a slug of iron is slid into the coil. What effect will this have? A) This will have no effect on the brightness of the lamp B) This will not affect the lamp's brightness because the coil will shift the phase, but not the magnitude, of the current through the lamp. C) The lamp will dim because energy will now be dissipated in the iron D) the lamp will dim because a back emf will be produced by the coil, and this will reduce the current flowing in the coil and the lamp E) the lamp will get brighter because there will be an induced emf that will drive more current through the lamp
D) the lamp will dim because a back emf will be produced
Electric power is transmitted over long distances at high voltage because A) electricity moves slower at higher voltage B) electricity moves faster at higher voltage C) the lines can be on taller poles D) there is less power lost E) lightning does more damage
D) there is less power lost
Consider an RLC series circuit. The impedance of the circuit increases if XC increases. A) true only if XL is greater than or equal to SC B) always true C) never true D) true only if XL is less than or equal to XC
D) true only if XL is less than or equal to XC
A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. When this system reaches its steady-state, the voltage across the resistor is: A) less than the battery's terminal voltage, but greater than zero B) greater than the battery's terminal voltage C) equal to the battery's terminal voltage D) zero
D) zero
Coherent monochromatic light of wavelength 632.8 nm passes through a pair of thin parallel slits. The figure shows the central portion of the pattern of bright fringes viewed on a screen 1.4 m beyond the slits. What is the distance between the two slits? A) 0.633 mm B) 0.562 C) 0.141 D) 0.0703 E) 0.281
E) 0.281
The captain of spaceship A observes enemy spaceship E escaping with a relative velocity of 0.48 c, as shown in the figure. A missile M is fired from ship A, with a velocity of 0.72 c relative to ship A. What is the relative velocity of approach of missile M, observed by the crew on ship E? A) 0.24 c B) 0.34 c C) 0.30 c D) 0.27 c E) 0.37 c
E) 0.37 c
A metal having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 4.0 eV. What is the maximum kinetic energy of the photoelectrons produced by this light? A) 4.7 x 10^-19 J B) 6.4 C) 3.8 D) 5.5 E) 2.6
E) 2.6
If the fifth order minimum in the diffraction pattern due to a thin slit is at 40 degrees from the central maximum, at what angle does the first order minimum occur? A) 8 degrees B) 1.7 degrees C) 3.4 D) 4.0 E) 7.4
E) 7.4
Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Half way between the two plates the electric field has magnitude E. If the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates? A) E/2 B) 0 C) 2E D) 4E E) E
E) E
Which of the following statements about inductors are correct? There may be more than one correct choice A) when it is connected in a circuit, an inductor always resists having current flow through it. B) when an inductor and a resistor are connected in series with a DC battery, the current in the circuit is reduced to zero in one time constant C) inductors store energy by building up charge D) when an inductor and a resistor are connected in series with a DC battery, the current in the circuit is zero after a very long time. E) an inductor always resists any change in the current through it
E) an inductor always resists any change in the current through it
A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffraction standpoint is? A) indeterminate B) in the near infrared C) in the middle D) in the same for all wavelengths E) in the near UV
E) in the near UV
The special theory of relativity predicts that there is an upper limit to the speed of a particle. It therefore follows that there is also an upper limit on the following properties of a particle A) the kinetic energy B) the linear momentum C) the total energy D) more than one of these E) none of these
E) none of these
You are a passenger on a spaceship. As the speed of the spaceship increases, you would observe A) your watch gaining time B) your watch losing time C) your watch speeding up D) your watch slowing down E) nothing unusual about your watch
E) nothing unusual about your watch
If the diameter of a radar dish is doubled, what ahppens to its resolving power, assuming that all other factors remain unchanged? A) the resolving power quadruples B) the resolving power is reduced to 1/4 of its original value C) the resolving power is reduced to 1/2 of its original value D) the resolving power does not change unless the focal length changes E) the resolving power doubles
E) the resolving power doubles
A charged particle is observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would be A) 1/(sqrt2) times the original radius B) 1/4 the original radius C) four times the original radius D) 1/2 the original radius E) twice the original radius
E) twice the original radius
Consider electrons flowing southward along a horizontal power line. The magnetic field generated directly below the wire by the current is pointing A) northward B) southward C) upward D) eastward E) westward
E) westward
