FINAL REVIEW
1. A(n) _____ wave requires a medium for propagation and its speed depends on _____. a. mechanical, the medium through which its traveling b. electromagnetic, the medium through which its traveling c. electromagnetic, the medium through which its traveling d. electromagnetic, the amount of energy in the wave
A
1. Magnetic field lines _____ the north pole of a magnet and _____ the south pole. a. point away from; point to b. are attracted to; are repelled by c. point to; point away from d. are repelled by; are attracted to
A
12. Two charges exert a force of 20 N on each other at a given distance. If the charges were moved closer together, what changes will be seen in the force they exert on each other? a. The force will increase b. The force will decrease c. The force will not change d. There is not enough information to make a prediction.
A
14. Which of the following accurately describes electric field lines? a. They point away from positive charges and toward negative charges. b. They are always parallel to each other. c. They always point away from a charge. d. They point away from negative charges and toward positive charges.
A
16. A 10.0 cm tall marker is placed 40 cm in front of a concave mirror with a focal distance of 20 cm. How tall will the marker's image be? a. - 10 cm b. - 5.0 cm c. 0.0 cm d. 5.0 cm
A
2. If you rub a plastic rod like an ink pen vigorously against a piece of wool, it will acquire a charge. If you then move that ink pen close to tiny pieces of paper or hole punches, the pieces of paper will lift off of the table and be attracted to the pen. Which of the following best describes how electrically neutral pieces of paper can be influenced by a charged object? a. the charge on the pen polarizes the pieces of paper b. the charge on the pen interrupts the gravitational force on the paper c. the paper can acquire a charge from touching the table d. the paper gains a charge from the pen
A
21. The electric field strength 1 m from a charge is 4000 N/C. What is the strength of the field 2 m from the charge? a. 1000 N/C b. 2000 N/C c. 4000 N/C d. 8000 N/C
A
22. For a concave lens, _____. a. the image formed will always be virtual, upright and reduced b. the image formed will always be real, upright and reduced c. the image formed will always be virtual, inverted and enlarged d. the image formed will always be real, inverted and reduced.
A
24. What is the speed of light through water (n = 1.33)? a. 2.25 x 108 m/s b. 2.63 x 108 m/s c. 3.00 x 108 m/s d. 3.38 x 108 m/s
A
25. A 1.8 m tall woman is standing 5.0 m in front of a convex lens with a focal length of 3.0 m. What is the magnification factor for her image in the lens? a. - 1.5 b. - 1.0 c. 0.0 d. 1.0 e. 1.5
A
25. Equipotential lines exist around an electric charge. These are lines where the potential difference between the source of the potential and any point along the line is the same. Which of the following analogies best represents equipotential lines? a. They are like a topographical map for charges. b. They are like a density column with layers of charge. c. They are like magnetic field lines. d. They are like electric field lines.
A
27. Points A and B have the same electric potential in the diagram above. How much work is required to move a charge from point A to Point B? a. 0 J b. 100 J for every unit of charge c. 1000 J for every unit of charge d. There is not enough information to answer the question
A
27. Which of the following can produce a virtual image with a magnification of 0.5? I. convex mirror II. concave mirror III. convex lens IV. concave lens a. I and IV only b. II and IV only c. I and II only d. III and IV only e. I, II, III, and IV
A
29. Consider the diagram above. Which of the following terms describe the image that is formed on the other side of the lens? a. real, inverted and enlarged b. real, inverted and reduced c. virtual, upright and enlarged d. virtual, upright and reduced e. virtual, inverted and enlarged
A
29. The electron volt is a measure of a. Energy b. Force c. Electric field strength d. Charge
A
3. A wave has a wavelength of 0.5 m and a frequency of 4 Hz. What is the speed of the wave? a. 2 m/s b. 4 m/s c. 8 m/s d. 12 m/s
A
31. Which of the following does NOT affect capacitance? a. the amount of charge available b. the surface area of the plates c. the separation of the plates d. the type of insulator used between plates
A
39. The flow of charge is called _____ and _____ is the reason that charges flow. a. current, potential difference b. potetenial difference, resistance c. resistance, current d. current, resistance
A
4. The diagram above shows the lines along which iron filings fell as they were sprinkled over 3 bar magnets. Pole A is the same as a. D and F. b. B and C. c. C and F. d. D and E.
A
40. What is the current in a simple circuit with a total resistance of 6 ohms connected to a 12 V battery? a. 2 A b. 6 A c. 12 A d. 72 A
A
42. A 2 ohm resistor is connected to a 9 V battery. What will happen to the current in the circuit if the resistance in doubled? a. the current is halved b. the current stays the same c. the current is doubled d. the current is quadrupled
A
44. Three resistors, 10 Ω, 15 Ω and 20 Ω, are connected in series across a 12 V electric potential difference. What is the voltage drop across the 15 Ω resistor? a. 4 V b. 6 V c. 12 V d. 18 V
A
46. What is current through the 30 Ω resistor in the diagram above? a. 0.392 A b. 0.588 A c. 0.777 A d. 0.982 A
A
5. Which of the following are the same for X-rays, FM radio waves, and gamma rays traveling through air? a. The waves' speeds b. The waves' frequencies c. The waves' wavelengths d. All of the above
A
9. A piece of copper has freemoving electrons. These are electrons that can move from atom to atom within the piece of metal. This property of copper means that it is a good a. Conductor b. Insulator c. Buffer d. Filament
A
For the lens below, an object 15 cm tall is placed 34 cm away from a convex lens with a focal length of 20 cm. 44. How far from the lens will the image appear? a. 48.6 cm b. 33.4 cm c. 24.1 cm d. 18.7 cm
A
36. Consider the concave mirror above. Which of the following is true for the image formed? Choose all that apply. a. the image is virtual b. the image is real c. the image is upright d. the image is inverted e. the image is enlarged f. the image is reduced
A,C,E
For the lens below, an object with a height of 6 cm is placed 8 cm in front of a convex lens with a focal length of 12 cm. 39. Which of the following apply to the image formed by the mirror above? a. the image is virtual b. the image is real c. the image is upright d. the image is inverted e. the image is enlarged f. the image is reduced
A,C,E
38. At a sporting event, the crowd does "the wave" as they cheer on the teams playing. Which of the following terms could be used to describe the wave? a. mechanical wave b. electromagnetic wave c. longitudinal wave d. transverse wave
A,D
For the mirror below, an object 12 cm tall is placed 25 cm away from a concave mirror with a focal length of 18 cm. 41.Which of the following apply to the image formed by the mirror above? a. the image is virtual b. the image is real c. the image is upright d. the image is inverted e. the image is enlarged f. the image is reduced
A,D,E
21. Which of the following are true for a concave lens? a. Diverging b. Converging c. can produce real images d. can produce virtual images e. can produce upright images f. can produce inverted images
A,E,F
10. The trough to trough or crest to crest distance along a wave is called the _________ and is measured in ______. a. Period | Meters b. Wavelength | Meters c. Period | Seconds d. Wavelength | Seconds
B
11. When a charged object is brought near an insulator, the insulator is said to be polarized if the charge is transmitted through the insulator. the molecules of the insulator orient themselves based on the charge of the object. the insulator acquires a charge from a connection to ground. the molecules of the insulator oppose the charged object.
B
12. A convex mirror is known as a _____ because it causes the light rays to _____. a. converging mirror; come together b. diverging mirror; spread apart c. converging mirror; spread apart d. diverging mirror; come together
B
14. What is the magnification factor of the reflection of a candle 1.5 m away from a plane mirror? a. 2.25 b. 1.00 c. 0.67 d. 0.11
B
15. A 1.8 m tall woman is standing 5.0 m in front of a convex mirror with a focal length of 3.0 m. What is the magnification factor for her image in the mirror? a. 0.25 b. 0.38 c. 0.50 d. 0.63
B
19. A light ray traveling through water exits the water into the air. Which of the following statements is true about the light ray? a. The light ray bends toward b. The light ray bends away from the normal and speeds up as it enters the air. c. The light ray bends toward the normal and slows down as it enters the air. d. The light ray bends away from the normal and slows down as it enters the air.
B
2. In electromagnetic waves, the ____ of the wave shows how much energy it carries. a. wave speed b. frequency c. amplitude d. medium
B
20. An isolated, hollow metal sphere is given a charge. Where is the electric field the strongest? a. at the center of the sphere b. along the outer surface of the sphere c. along the inner surface of the sphere d. at infinity
B
20. When you place a pencil in a glass of water, the pencil appears to be broken in two. Which wave behavior explains this occurrence? a. Reflection b. Refraction c. Interference d. Diffraction
B
22. Two identical small, negative charges are placed near a large negative charge. One is 0.5 m away and the other is 1 m away. Which of the following statements is true? a. The charge at 1 m has more potential than the charge at 0.5 m. b. The charge at 0.5 m has more potential than the charge at 1 m. c. The electric field felt by the charge at 1 m is greater than the field at 0.5 m. d. The electric force on the charges are equal which means that their electric potential is equal.
B
3. A lightning bolt transfers 27 C of charge to the ground during its strike. How many electrons are transferred? a. 1.23 x 105e b. 1.69 x 1020 e c. 2.01 X 108e d. 2.47 X 1018 e
B
30. A 1.00 C charge with a mass of 0.0150 kg is released from rest at a location with an electric potential of 18.0 V . What is the speed of the charge when it reaches a location with an electric potential of 2.00 V? a. 5.65 m/s b. 46.2 m/s c. 2133 m/s d. 4500 m/s
B
33. If you stand 2.5 m from a plane mirror, how far from you would your image in the mirror appear? a. 2.5 m b. 5.0 m c. 7.5 m d. 10.0 m
B
33. Two conductors have a potential difference of between them. The have charges of equal magnitude and opposite sign, the magnitude being . What is the capacitance of the this system? 1 nF = 1 x 10^negative 9 F a. 1.67 nF b. 3.33 nF c. 0.300 GF d. 0.600 GF
B
35. Two parallel conducting plates are have a surface area A and are separated by a distance d. They are connected to a battery that provides a voltage V. What will happen to the charge on the plates if the separation is doubled while the battery is connected a. The charge on the plates will double. b. The charge on the plates will be halved. c. The charge on the plates will remain constant. d. The charge on the plates will dissipate until they become neutral.
B
37. A parallel plate capacitor is charged by a battery and then disconnected. If the separation is increased, what effect with this have on the charge and the voltage across the capacitor? a. the charge will increase, and the voltage will remain constant b. the charge will remain constant and the voltage will increase c. the voltage and charge both decrease d. the charge will not change and the voltage will decrease.
B
37. Consider the concave mirror above. The focal length of the mirror is 25 cm. If the object is placed at 15 cm, how far from the mirror does the image appear? a. - 42 cm b. - 37.5 cm c. 37.5 cm d. 42 cm
B
38. The capacitance of a parallel plate capacitor can be increased by doing which of the following? a. increasing the separation between the plates b. increasing the surface area of the plates c. connecting the plates to a higher potential difference d. increasing the amount of charge on the plates
B
42.Which of the following cannot be explained by the wave model of light? a. red light diffracts as it passes through an opening approximately the same size as its wavelength b. blue light can eject electrons from a metal plate, but red light cannot c. blue light can create interference patterns when passing through two or more slits simultaneously d. red light reflects off mirrors and refracts through glass.
B
45. What is the current coming out of the battery in the diagram above? a. 0.73 A b. 0.98 A c. 1.96 A d. 110 A
B
5. There is a long, straight wire running into the plane of the screen with current flowing in the direction out of the plane of the screen. A compass is place close to the wire as shown above. Which direction would you expect the needle of the compass to point? a. to the N labeled on the compass b. to the E labeled on the compass c. half way between the E and the N labeled on the compass d. half way between the W and the N labeled on the compass
B
6. A particular atom has 17 neutrons, 29 electrons, and 8 more protons than neutrons. What is atom's charge? a. - 8 b. - 4 c. 0 d. +4
B
7. A balloon initially holds a negative charge of 0.25 C. When it is held next to an uncharged electroscope, you would expect a. the leaves to move closer together. b. the leaves to increase in separation. c. the negatively charged leaf to raise. d. the positively charged leaf to raise.
B
35.A light ray moves from air into a piece of glass. Check all of the following that are true for the light ray as it enters the glass. a. the light speeds up b. the light slows down c. the light bends toward the normal d. the light bends away from the normal
B,C
5. Select all of the statements that are true. a. Positively charged atoms are attracted to positively charged atoms b. Positively charged atoms are attracted to negatively charged atoms c. Negatively charged atoms are attracted to positively charged atoms d. Negatively charged atoms are attracted to negatively charged atoms
B,C
23. Which of the following are true for a convex lens? a. diverging b. converging c. can produce real images d. can produce virtual images e. can produce upright images f. can produce inverted images
B,C,D,E,F
For the lens below, an object 15 cm tall is placed 34 cm away from a convex lens with a focal length of 20 cm. 43. Which of the following apply to the image formed by the mirror above? a. the image is virtual b. the image is real c. the image is upright d. the image is inverted e. the image is enlarged f. the image is reduced
B,D,E
11. Wave 1 has a frequency of 2 Hz, an amplitude of 10 cm, and is at max height at time t = 0. Wave 2 has a frequency of 1 Hz, an amplitude of 20 cm, and is at max height at time t = 0. What is the difference in wave heights between the two waves at time t = 0.5 seconds? a. 0 cm b. 10 cm c. 30 cm d. 40 cm
C
15. Which of the following most accurately describes electric force and electric field strength? a. Electric force and electric field strength are both vector quantities, but direction only matters when discussing forces. b. Electric force and electric field strength are both vector quantities, but direction only matters when discussing field strength. c. Electric force and electric field strength are both vector quantities so direction has to be considered when discussing these quantities. d. Electric force and electric field strength are both scalar quantities so direction does not matter in discussion of either quantity.
C
17. Two electrons are located 1 m apart. What is the magnitude of the force on one of them? a. 3.88 x 10 ^negative 26 b. 9.23 x 10 ^negative 28 c. 2.31 x 10 ^negative 28 d. 2.57 x 10 ^negative 38
C
18. Two charged particles are initially separated by a distance d and the magnitude of the electric force on one is F1. If the distance is doubled, and the magnitude of the force on one of the particles is now F2, what is the ratio of F2/F1? a. ½ b. 2 c. ¼ d. 4
C
19. Examine the system of charges above. The charges are arranged at the points of an equilateral triangle. What is the net force on Q1? a. 0.315 N to the right b. 0.315 N to the left c. 0.63 N to the right d. 0.63 N to the left
C
23. In an electric field, there are regions where charges can move around without work being performed on them. This happens where the electric potential is the same for those charges. These regions are known as a. parallel plates b. electric field lines or surfaces c. equipotential lines or surfaces d. field line variations
C
24. When work is done on a positive test charge, the ___________________ both increase. a. electric field strength and electric potential b. electric force and electric field strength c. electric potential and electric potential energy d. electric potential energy and electric field strength
C
26. A 1.8 m tall woman is standing in 5.0 m in front of a concave lens with a focal length of 3.0 m. What is the magnification factor of her image? a. 0.00 b. 0.25 c. 0.38 d. 0.50
C
26. A positive charge is placed at point B inside an electric field represented by the arrows in the diagram. To move the charge from point B to point C, _____ is done on the charge and the electric potential energy is greatest at point _____. a. positive external work, B b. positive external work, C c. negative external work, B d. negative external work, C
C
28. Light shines through a diamond (n = 2.42) sitting in a pool of water (n = 1.33) at an angle of 15 degrees from the normal. At what angle from the normal does light escape into the pool of water? a. 24 b. 26 c. 28 d. 30 e. 32
C
32. For a plane mirror, a normal line is an imaginary line that is drawn perpendicular to the surface of the mirror at a point where a light ray strikes. The angle of incidence and the angle of reflection are measured with respect to the normal line. Which of the following is always true? a. the angle of incidence is greater than the angle of reflection b. the angle of incidence is less than the angle of reflection c. the angle of incidence is equal to the angle of reflection d. the angle of incidence can be greater than, equal to or less than the angle of reflection
C
32. If the surface area of the plates of a capacitor is increased, you expect a ________ in the capacitance. Also, if the separation between the plates is decreased, you would expect a ________ in capacitance. a. increase, decrease b. decrease, decrease c. increase, increase d. decrease, increase
C
4. For a wave moving through a given medium, as the frequency _____, the wavelength will _____. a. increases, not change b. decreases, not change c. increases, decrease d. increases, increase
C
41. What is the equivalent resistance if three 12 ohm resistors are connected in series? What is it if they are connected in parallel? A. 12 ohms, 36 ohms B. 36 ohms, 12 ohms C. 36 ohms, 4 ohms D. 4 ohms, 36 ohms
C
43. What is the equivalent resistance of the resistors above? a. 1000 ohm b. 750 ohm c. 550 ohm d. 191 ohm
C
47. Three lightbulbs with resistance R1=100 Ω, R2=100 Ω and R3=300 Ω are connected to a 110 V source. Which of the following statements best describes what will happen if the lightbulb at R1 burns out? a. R2 will burn brighter and R3 will dim. b. R2 will not light anymore and R3 will burn brighter c. R2 will not light and R3 burn the same as before d. R2 and R3 will both burn brighter
C
50. What is the capacitance of the system in the diagram above? a. 2.32 nF b. 1.33 nF c. 0.610 nF d. 0.550 nF
C
6. A small circuit generates a current that goes through a loop of wire that runs around a clock, clockwise. As you face the clock face, what is the direction of the magnetic field within the loop? a. Clockwise b. Counter-clockwise c. into the clock d. out of the clock
C
7. An EM Wave is made of a(n) _______ field and a(n) _________ field oscillating ________ to each other. a. Electric | Mechanical | Parallel b. Mechanical | Magnetic | Parallel c. Magnetic | Electric | Perpendicular d. Magnetic | Mechanical | Perpendicular e. Electric | Magnetic | Parallel
C
8. The oscillation of a transverse wave is _________ to its direction of travel and the oscillation of a longitudinal wave is _________ to its direction of travel. a. Parallel | Perpendicular b. Parallel | Parallel c. Perpendicular | Parallel d. Perpendicular | Perpendicular
C
9. A certain wave has an amplitude of 1.5 m and a frequency of 2 Hz. How long does it take for this wave to move six full wavelengths? a. 1 sec b. 2 sec c. 3 sec d. 4 sec
C
For the lens below, an object with a height of 6 cm is placed 8 cm in front of a convex lens with a focal length of 12 cm. 40. How far from the lens will the image appear? a. - 8 cm b. - 12 cm c. - 24 cm d. - 32 cm
C
1. Two balloons are suspended from the ceiling and hang side by side. The balloons are separated, and both are rubbed with rabbit fur. Which of the follow best describes the expected behavior of the balloons when released to hang next to each other again? a. the balloons will attract each other because they now have opposite charges b. the balloons will repel each other because they now have opposite charges c. the balloons will attract each other because they both have like charges d. the balloons will repel each other because they both have like charges
D
10. What is the charge on the nucleus of a single gold atom? a. 0.5 x 10^17 b. 1.3 x 10^17 c. 0.5 x 10 ^negative 17 d. 1.3 x 10 ^negative17
D
13. Light rays that strike a concave mirror parallel to the principle axis will _____. a. follow the law of reflection like a plane mirror b. reflect through the focal point c. will converge d. all of the above
D
13. What amount of force is felt by a 10 nC charge in an electric field where there strength is 25000 N/C? a. 25 N b. 2.5 N c. 0.025 N d. 0.00025 N
D
16. The concept of a test charge is vitally important in the discussion of electricity, magnetism and electromagnetism. A test charge is a hypothetical charge taken to be much smaller than any other charge under discussion, and to be perfectly accurate, should be taken to be infintesimal. Which of the following reasons explains why a test charge needs to be so small? a. it is the closest to the original system that we can get b. conservation of energy requires that we minimally disturb the system c. conservation of charge requires that we not change the charge of the system being considered d. a small or infintesimal charge will have small or infintesimal effects on the system
D
17. The focal distance of a concave mirror is 10 cm. An object's image is located 15 cm in front the mirror at a height of negative 2.0 cm. How tall is the object? a. 0.5 cm b. 1.0 cm c. 2.0 cm d. 4.0 cm
D
18. An object is located at the focal point of a concave mirror. The resultant image ____________. a. is inverted, smaller, and real b. is upright, enlarged, and virtual c. is inverted, larger, and real d. does not exist
D
2. If you cut a bar magnet in half, then a. each smaller magnet will create the same magnetic field as the original. b. the magnetic properties will be destroyed. c. you will have isolated the north and south magnetic monopoles. d. you will have two smaller magnetic dipoles.
D
28. Two electrons are separated by 1.0 m . What is the electric potential halfway between them? a. - 0 V b. - 1.44 nV c. - 2.88 nV d. - 5.76 nV
D
3. Magnetic field lines point from _____ , so the North Geographic Pole is actually a _____ magnetic pole. a. north to south, north b. south to north, north c. south to north, south d. north to south, south
D
31. A candle is located 28 cm from a lens with a focal length of 15 cm. How far away from the lens should a screen be placed to find the focused image? a. 0.31 b. 15 c. 28 d. 32.3 e. 56
D
34. A parallel plate capacitor consists of two circular plates each with a radius 2.00 cm and separated by a distance of 0.0200 mm . What is the capacitance? 1 pF = 1 x 10 ^negative 12 F a. 0.177 pF b. 0.556 pF c. 177 pF d. 556 pF
D
34. Diamonds get their sparkle due to total internal reflection. Once light enters the diamond, if the diamond is cut well, the light will strike the internal surface of the diamond at angles larger than the critical angle, which prevents the light from escaping the diamond and keeps it bouncing around inside of the gem. If incident light falls onto a diamond at an angle of 45 degrees, it will refract at an angle of 17 degrees as it enters the diamond. What is the index of refraction of the diamond? a. 1.43 b. 1.75 c. 2.03 d. 2.42
D
36. How much energy can a capacitor with a capacitance of 125 pF and supporting a voltage of 62.5 V hold? a. 7.21 x 10 ^negative 7 b. 4.96 x 10^negative 7 c. 4.88 x 10^negative 7 d. 2.44 x 10^negative 7
D
4. An oxygen nucleus has 6 electrons orbiting it. What is the charge on the oxygen atom? a. negative 2 b. negative 1 c. +1 d. +2
D
48. Four capacitors all with a capacitance of 2 mF are connected in parallel. What is the capacitance of the system of capacitors? a. 0.5 mF b. 1 mF c. 4 mF d. 8 mF
D
49. Consider two capacitors both with a capacitance of 3 F. Which of the following combinations will provide the greatest amount of charge on each capacitor? a. The capacitors connected in series to a 9 V battery. b. The capacitors connected in parallel to a 9 V battery. c. The capacitors connected in series to a 12 V battery. d. The capacitors connected in parallel to a 12 V battery.
D
6. Order the following EM waves from least (left) to greatest (right) frequency. a. Microwaves < Ultraviolet Light < FM Radio < AM Radio < Visible Light b. FM Radio < Ultraviolet Light < AM Radio < Microwaves < Visible Light c. Visible Light < AM Radio < FM Radio < Ultraviolet Light < Microwaves d. AM Radio < FM Radio < Microwaves < Visible Light < Ultraviolet Light
D
8. Total charge is _______ constant in any process. a. Never b. Rarely c. Mostly d. Always
D
30. A candle is placed in front of a convex lens with a focal length of 16 cm. At which distance(s) from the lens listed below could you place the candle in order to create a real image? a. 4 cm b. 8 cm c. 16 cm d. 24 cm e. 32 cm
D,E
