Phy.1.1.1 Analyze motion graphically and numerically using vectors, graphs and calculations.

1. Which pair of graphs represents the correct relationship between displacement and the velocity of a moving object?

2. A person in a rowboat attempts to cross a river that flows west with a strong current. The students starts on the south bank of the river and is trying to reach the north bank directly across. In what direction should the student row the boat? Support your answer with an explanation and reasoning for those choices you view as incorrect.

a. due north b. due west c. in a northwesterly direction d. in a northeasterly direction

3. The graph represents the position of a cart as a function of time.

What is the velocity at 6 seconds?a. 0.33 m/sb. 0.43 m/sc. 0.50 m/sd. 1.0 m/s

4. The graph represents the motion of a car moving linearly.

When is the car moving backwards?

a. 0 s to 10 sb. 20 s to 40 sc. 40 s to 50 sd. 50 s to 60 s

5. The velocity time graph represents the motion of a car traveling over a time interval of 6 seconds.

Describe the car’s motion including acceleration, velocity and displacement over the 6 second time interval shown.

6. The average speed of a cart during a 15-s interval is 3.0 m/s. What is the total distance traveled by the cart?

a. 0.20 mb. 5.0 mc. 18 md. 45 m

7. A car travels at 11 m/s east for 61 s, and then travels at 25 m/s east for 31 s. What is the average velocity of the car?

a. 8.5 m/s eastb. 16 m/s eastc. 18 m/s eastd. 36 m/s east

8. A person throws a ball upward into the air. Which represents the motion of the ball just after the ball leaves the person’s hand? Support your answer with an explanation and reasoning for those choices you view as incorrect.

a. Velocity and acceleration are both upward. b. Velocity and acceleration are both downward. c. Velocity is upward and acceleration is downward. d. Velocity is downward and acceleration is upward.

9. Which graph represents the relationship between the gravitational acceleration of a falling body and the mass of the body?

Phy.1.1.2 Analyze motion in one dimension using time, distance, displacement, velocity and acceleration.

10. The graph represents the relationship between velocity and time for an object.

What is the acceleration of the object? a. 15 m/sec/sec b. 5 m/sec/sec c. 3 m/sec/sec d. 0 m/sec/sec

Support your answer with an explanation and reasoning for those choices you view as incorrect.

11. An athlete running 2.6 m/s increases his velocity to 3.7 m/s in 2.7 s. What is the acceleration of the runner?

a. 0.41 m/s/sb. 1.2 m/s/sc. 1.4 m/s/sd. 2.3 m/s/s

12. A ball is thrown straight up. When the ball reaches the highest point its velocity is zero. Is the acceleration also zero? Explain your answer and include a velocity-time graph sketch in your explanation.

13. The graph shows the acceleration of a car over time.

If the car starts from rest, what is the velocity of the car after 5 seconds?

a. 0 m/s b. 0.80 m/s c. 4.0 m/s

d. 20. m/s

Phy.1.1.3 Analyze motion in two dimensions using angle of trajectory, time, distance, displacement, velocity and acceleration.

14. Which object will strike the ground first: one that is thrown horizontally from a cliff or one that is dropped simultaneously from the same height? Support your answer with an explanation and reasoning for those choices you view as incorrect.

a. the one that is thrownb. the one that is droppedc. hit at the same timed. cannot be determined

15. A ball is thrown with a velocity of 12.0 m/s at an angle 30.0° above horizontal. Ignoring air resistance, what is the ball’s vertical component of velocity?

a. 6.00 m/sb. 6.93 m/sc. 10.4 m/sd. 20.8 m/s

16. An object is thrown off a cliff above level ground with an initial horizontal velocity of 15 m/s. It takes 4 seconds for the object to reach the ground. If air resistance is negligible, what is the height of the cliff? Support your answer with an explanation and calculations.

a. 60 mb. 80 mc. 120 md. 160 m

Phy.1.2.1 Analyze forces and systems of forces graphically and numerically using vectors, graphs and calculations.

17. A spring launcher is set on the edge of a laboratory table. A ball is launched with a horizontal velocity v1 and falls to the floor a horizontal distance d1 from the table. A second ball is launched from the spring with a velocity three times that of vi. How does the horizontal distance d2 of the second ball compare to d1 of the first ball? Support your answer with an explanation and reasoning for those choices you view as incorrect.

a. d2=d1b. d2=d1/3c. d2=1.73d1d. d2=3d1

18. If a ball is thrown 4.5 m/s horizontally from a 94-m cliff, how far has the ball fallen after 2.7 s? Neglect air resistance

a. 36 m b. 48 m c. 58 m d. 71 m

19. Determine the net force on an object due to concurrent forces of 25 N North and 10 N East. Explain your calculations.

Phy.1.2.2 Analyze systems of forces in one dimension and two dimensions using free body diagrams.

20. A football is kicked at an angle of 40 degrees above the horizontal with a force of 5.0 N. (a) Draw a free body diagram for the ball before, during and after contact. (b) Determine the horizontal and vertical components of the force. Explain your calculations.

21. The diagram represents forces actingon a block that accelerates 6.0 m/s/s on a frictionless surface. What is the mass of the block?

a. 2.0 kgb. 4.0 kgc. 12 kgd. 72 kg

22. A 2.6-kg block rests on a plane inclined at 35° to the horizontal. What is the frictional force acting on the block?

a. 11 Nb. 15 Nc. 22 Nd. 26 N

23. A 2-kg body of mass is moving on a horizontal frictionless surface with a velocity of 4 m/s. What is the net force required to keep the body moving with the same velocity and direction for 5 s?

a. 0 Nb. 2 Nc. 8 Nd. 20 N

24. A horizontal force acts on a block sliding on a horizontal surface. The force of kinetic friction between the block and the surface is 0.5F. If the direction of the applied force is reversed, which is true?

a. The magnitude of the net force on the block increases.b. The magnitude of the acceleration of the block remains the same.c. The kinetic energy of the block increases.d. The velocity of the block remains the same.

25. The diagram represents a block with two applied forces. Ignoring friction, how much force pulls the object to the left?

a. 120 Nb. 350 Nc. 620 Nd. 720 N

26. This diagram represents a 1.9-kg object in static equilibrium hanging from two strings, I and II. What is the force on string II?

a. 28 Nb. 21 Nc. 19 Nd. 17 N

27. A rope horizontally pulls a massive object lying on a surface with friction with a constant velocity. What describes the force on the rope?

a. equal to the frictional forceb. greater than the frictional forcec. equal to the weight of the objectd. greater than the weight of the

28. Draw free-body diagrams for the following examples and label the forces. Examples: (a) Box sliding down an incline plane, (b) a person pushing a lawn mower, (c) two boxes attached to a pulley with box 1 resting and box 2 hanging from the pulley (Atwood Machine). Explain your diagrams.

Phy.1.2.3 Explain forces using Newton’s laws of motion as well as the universal law of gravitation.

29. Two students are pushing a stalled car. What is the acceleration of the car?

a. 0.015 m/s/sb. 0.020 m/s/sc. 0.040 m/s/sd. 0.059 m/s/s

30. A student pushes a 35-kg block on a frictionless, horizontal surface with a horizontal force of 18 N. If the block is initially at rest, what is the speed of the block after the student pushes the block 20.1 m?

a. 2.3 m/sb. 4.5 m/sc. 6.3 m/sd. 21 m/s

31. The gravitational force between two masses is 1.0 x 103N. If the distance between the masses is doubled, what gravitational force would exist?

a. 2.0 x 103 N b. 5.0 x 102 N c. 2.5 x 102 N d. 1.0 x 102 N

Phy.1.2.4 Explain the effects of forces (including weight, normal, tension, and friction) on objects.

32. A force FA pulls on a box with a mass of m on a rough surface. W represents the weight of the box. FN represents the normal force on the box, and Ffr represents the frictional force.

Describe the relationship between the forces when the box moves with (a) constant velocity, and (b) constant acceleration.

33. A block of mass M is motionless on a frictionless inclined plane. The mass is attached to the wall with a string. What represents the magnitude of the tension T in the string?

a. Mg sin θ b. Mg tan θ c. Mg cos θ d. Zero Newtons

Phy.1.2.5 Analyze basic forces related to rotation in a circular path (centripetal force).

34. An object travels around a 120-m radius circular path at a constant 70 m/s. The centripetal force on the object is 3.5 ×104 N. What is the mass of the object?

a. 4.17 x 100 kgb. 8.57 x 102 kgc. 6.00 x 104 kgd. 1.43 x 106 kg

35. A person swings a stone attached to a string in a circle over her head. The string makes one complete revolution every second. The tension in the string is FT. She increases the speed of the moving stone, without changing the radius of the circle and the string makes two revolutions every second. What is the effect on the tension of the string? Support your answer with an explanation and reasoning for those choices you view as incorrect.

a. The tension is unchanged b. The tension decreases to half the original value c. The tension increases to twice the original value d. The tension increases to four times the original value

36. An object moves in uniform circular motion, and the centripetal force on the object is 4.0 N. If the mass of the object decreases by a factor of 2, what will be the centripetal force on the object?

a. 1.0 Nb. 2.0 Nc. 8.0 Nd. 16 N

37. The objects shown at right are moving in a horizontal, uniform, circular motion. Which object experiences the least centripetal force?

38. Explain how centripetal acceleration occurs when an automobile rounds a curve.

39. A car travels at a constant speed on a flat, circular track. Which factor, when doubled, will decrease the centripetal force on the car?

a. mass of the car b. weight of the car c. velocity of the car d. radius of the track

Phy.1.3.1 Analyze the motion of objects involved in completely elastic and completely inelastic collisions by using the principles of conservation of momentum and conservation of energy.

40. A 62 kg skater is skating due west at 3.0 m/s when she collides with a 42 kg skater headed east at 12 m/s. If they remain tangled together, what is their final velocity? Support your answer with an explanation and reasoning for your calculations.

41. A 40 kg physics student is riding a 1.5 kg skateboard. He is traveling 2.8 m/s. The student jumps off of the skateboard and the skateboard immediately stops. What is the speed and direction of the student’s jump? Support your answer with an explanation and reasoning for your calculations

a. 2.8 m/s in the opposite direction as he was riding b. 2.8 m/s in the same direction as he was riding c. 2.9 m/s in the opposite direction as he was riding d. 2.9 m/s in the same direction as he was riding

42. A 60-kg student on ice skates stands at rest on a frictionless frozen pond and holds a 10-kg brick. He throws the brick east with a speed of 18 m/s. What is the resulting velocity of the student?

a. 3.0 m/s west b. 3.0 m/s east c. 18 m/s west d. 18 m/s east

43. Explain why inelastic collisions do not break the law of conservation of energy. What is meant by “conserved in a system of objects”?

44. An object has a mass, m, and velocity, v. Which change would make its momentum become one-fourth as much?

a. Its mass becomes m/2, and its velocity becomes v/2.b. Its mass remains m, and its velocity becomes v/2.c. Its mass becomes m/3, and its velocity remains v. d. Its mass becomes m/2, and its velocity remains 2v.

45. A 75-kg object traveling 15 m/s collides with and sticks to a 315-kg object initially at rest. What is the final velocity of the two objects?

a. 2.9 m/sb. 3.6 m/sc. 12 m/sd. 19 m/s

Phy.1.3.2 Analyze the motion of objects based on the relationship between momentum and impulse.

46. A 3.0 ×103 -kg truck traveling at 20.0 m/s in a test laboratory collides into a wall and comes to rest in 0.10 s. What is the magnitude of the average force acting on the truck during the collision?

a. 1.5 × 101Nb. 1.5 × 103Nc. 6.0 × 103Nd. 6.0 × 105N

47. A 15.0 kg object, moving at 11 m/s, crashes into a wall and is stopped in 0.075 s.a. Determine the impulse and stopping force on the object.b. How would increasing the stopping time affect the impulse and force on the object?

48. A 13-N east horizontal force acts in the same direction as a 6.4-kg block as it slides 2.5m s on a frictionless, horizontal surface for 2.1 s. What is the speed of the block after force is applied?

a. 1.7 m/sb. 4.3 m/sc. 6.7 m/sd. 7.2 m/s

49. What is the difference in momentum between a 53-kg athlete running 3.58 m/s and a 880.-kg car traveling 1.03 m/s?

a. 130 kgm/sb. 720 kgm/sc. 1,100 kgm/sd. 2,100 kgm/s

50. A 2.0 x 102 g mass slides across a frictionless surface with a velocity of 41 m/s. It hits a wall and bounces back in the opposite direction at 22 m/s. If the collision takes 4.0 x 10-4 s to occur, what force is applied by the wall on the mass?

a. -9.5 x 103 Nb. -3.2 x 104 Nc. -9.5 x 106 Nd. -3.2 x 107 N

Phy.2.1.1 Interpret data on work and energy presented graphically and numerically.

51. A horizontal force, F, is used to pull a 5.0-kg block across a floor at a constant speed of 3.0 m/s. The frictional force between the block and the floor is 10 N. The work done by the force in 1 minute is most nearly

a. 0 J b. 30 J c. 600 J d. 1,800 J

52. A force moves an object in the direction of the force.

Using the force versus position graph shown, determine the work done when the object moves from 2.0 m to 4.0 m.

Phy.2.1.2 Compare the concepts of potential and kinetic energy and conservation of total mechanical energy in the description of motion of objects.

53. The diagram below shows a rock on the edge of cliff where h is the height of the cliff.

If the rock rolls off the cliff, what is the kinetic energy of the rock just before it hits the ground?

a. mgh b. (1/2)mv2

c. (1/2)mv2 + mghd. mgh - (1/2)mv2

54. A ball is released from the top of an inclined plane as shown below. Ignoring friction, where will the potential energy (PE) and kinetic energy (KE) of the ball be at a maximum?

a. PE at J, KE at Mb. PE at K, KE at Lc. PE at L, KE at Kd. PE at M, KE at J

55. A 58-kilogram pole vaulter needs to vault a height of 6.0 m. Assuming that all his kinetic energy can be used for the vault, what is the speed that the vaulter must be traveling in order to clear this height? Ignore elastic PE of the bent pole.

a. 9.8 m/s b. 15 m/s c. 11 m/s d. 36 m/s

56. A 290-N force is used to compress a spring. The spring constant of the spring is 5,880 N/m. How far is the spring compressed?

a. 0.0050 mb. 0.049 mc. 0.31 md. 20. m

57. A 588-N person carrying 294 N of equipment starts climbing a mountain that is 3,118 m high. What is the minimum energy required for the person to climb the mountain?

a. 2.81 × 105 Jb. 9.17 × 105 Jc. 1.83 × 106 Jd. 2.75 × 106 J

58. A student drops a 0.45-kg ball that hits the floor with a speed of 5.3 m/s. If the velocity of the ball is 4.8 m/s when it hits the floor on the second bounce, how much mechanical energy is lost during the first bounce?

a. 0 Jb. 1.1 Jc. 4.8 Jd. 6.3 J

59. A pendulum swings back and forth up to a maximum height of 1.52 m. Neglecting friction, what is the speed of the pendulum at the lowest position?

a. 2.7 m/sb. 3.9 m/sc. 5.5 m/sd. 30. m/s

Phy.2.1.3 Explain the relationship among work, power and energy.

60. A student throws an object downward. The initial kinetic energy of the object is 360 J. When the object reaches the ground, the kinetic energy of the object is 3 times the initial kinetic energy of the object. What was the initial potential energy of the object?

a. 360 Jb. 720 Jc. 1,100 Jd. 1,400 J

61. The chart represents the work output and the time to do the work for four machines.

For which machine is the power output least?a. Ib. IIc. IIId. IV

62. Which is a correct statement about the relationship between work, energy and power?

a. Work transfers energy. Power is the rate at which work is done or energy transferred. b. Work is only done when an object is moved. Energy and power are the same quantity. c. Power is measure of how much work can be done. Energy is a measure of the time interval in which the work is

done. d. Energy and power are a measure of the amount of force while work is related only to the distance an object moves.

63. What is the maximum velocity at which a 25-W motor can lift a 8.5 kg object upward?

a. 0.30 m/sb. 2.9 m/sc. 7.6 m/sd. 29 m/s

64. A machine lifts a 35-kg object 20.0 m in 2.0 s. How much power is produced by the machine to lift the object?

a. 350 Wb. 890 Wc. 3,400 Wd. 6,900 W

65. How much power is required to lift a 12-N box at 4.5 m/s?

a. 2.6 Wb. 5.4 Wc. 44 Wd. 54 W

Phy.2.2.1 Analyze how energy is transmitted through waves, using the fundamental characteristics of waves: wavelength, period, frequency, amplitude, and wave velocity.

66. The diagram represents two pulses moving toward each other on a rope.

What occurs when the pulses meet?

67. Is there a difference between the velocity of a wave moving along a string and the velocity of a particle of the string? Explain your answer.

68. A sound wave of 410Hz travels through air at 335 m/s. (a) Determine the wavelength. (b) If the frequency doubled, what would be the resulting wavelength and wave speed? (c) What characteristic of the wave is a measure of energy transmitted?

69. What is the frequency of a wave with a speed of 10 m/s and wavelength of 20 m?

a. 0.5 Hzb. 2 Hzc. 30 Hze. 200 Hz

70. This diagram represents a wave. If each point on the wave takes 0.020 s to travel from X to Y, what is the period of the wave?

a. 0.0080 sb. 0.045 sc. 0.18 sd. 0.26 s

Phy.2.2.2 Analyze wave behaviors in terms of transmission, reflection, refraction and interference.

71. The frequency of a wave is 5.1 ×1014 Hz. The speed of a wave in a certain medium is 2.1 ×108 m/s. What is the index of refraction of the medium?

a. 0.41b. 0.73c. 1.4d. 2.4

72. How will a ray of light be affected as it passes from air into water?

a. Its frequency and wavelength will increase. b. Its frequency and wavelength will decrease. c. Its frequency and unchanged but its wavelength increases. d. Its frequency is unchanged but its wavelength decreases.

73. Draw wave pulses that demonstrate destructive and constructive interference. Explain these sketches by discussing wave displacement, direction, and amplitude.

74. A student places a piece of glass over a tank of water. What happens to the speed of a light ray that shines from air through glass into the water?

a. increases in glass and waterb. decreases in glass and waterc. increases in glass, then decreases in waterd. decreases in glass, then increases in water

75. A light ray traveling through air is incident on a pool of water. If the light has an angle of incidence of 30.6°, what is the angle of refraction in the water?

a. 22.5o

b. 30.6o

c. 42.6o

d. 48.8o

Phy.2.2.3 Compare mechanical and electromagnetic waves in terms of wave characteristics and behavior

76. What will most likely happen when a ringing bell is placed inside a bell jar connected to a vacuum pump?

a. The sound intensity of the bell will increase. b. The sound intensity of the bell will decrease. c. The frequency of the sound will increase. d. The speed of the sound will increase.

77. Compare sound and light waves in terms of the following: (a) how they are produced, (b) wave speed, (c) interference.

Phy.2.3.1 Explain Ohm’s law in relation to electric circuits.

78. If the amount of charge that flows through a circuit depends on how much the metal wire resists the flow of charge, describe the mathematical relationship between current and resistance.

79. If all bulbs and power sources shown are identical, which circuit contains only 2 lit bulbs?

80. This diagram represents a DC circuit. Each resistor has a value of 5.1 Ω.

If R2 is removed from the circuit, how much current will flow through the circuit?

a. 1.2 Ab. 1.6 Ac. 2.4 Ad. 4.8 A

81. In the diagram at right, all light bulbs are identical. In which circuit would the light bulbs be the dimmest?

82. Why would a current exist in an electric circuit?

a. because the electrons collide with other particles in the conductor b. because the electrons collide with other particles in the insulator c. because an electric potential difference exists across the ends of the circuits d. because the amount of charge is reduced on the electrons

83. Use the diagram below right to answer the question that follows.

In the circuit shown, a voltage of 6 V pushes charge through two resistors of 3Ω each, what is the current in the circuit?

a. 1 A b. 2 A c. 3 A d. 6 A

Phy.2.3.2 Differentiate the behavior of moving charges in conductors and insulators.

84. Which is least likely to affect the resistance of an electric circuit?

a. the length of the wire b. the insulator on the wire c. the cross-section of the wire d. the resistivity of the wire

85. In a good insulator, what is most likely true of electrons?

a. They are free to move around. b. They are held close to the nucleus. c. They move from the conductor to the insulator. d. They move from the insulator to the conductor.

86. What happens when a positively charged rod touches a neutral metal sphere?

a. Protons move from the sphere to the rod.b. Protons move from the rod to the sphere.c. Electrons move from the sphere to the rod.d. Electrons move from the rod to the sphere.

Phy.2.3.3 Compare the general characteristics of AC and DC systems without calculations.

87. How are AC and DC current different?

a. Alternating current produces a flow of protons, while direct current produces a flow of electrons. b. Alternating current steadily flows in one direction, while direct current flows in two directions. c. Direct current is produced by an electric generator, while alternating current is produced by a battery. d. Direct current flows in one direction, while alternating current reverses direction many times per second.

Phy.2.3.4 Analyze electric systems in terms of their energy and power.

88. The CD player plugged into the auxiliary outlet in Ellen’s car has a resistance of 6.0 Ω. a) How much current does the CD player draw when it is run off the car’s 12 V battery? b) How much power does the CD player use?

89. How is electric power and electrical energy related?

a. Electric power is the rate that electrical energy is used to do mechanical or thermodynamic work.b. Electrical energy is randomly reduced by electric power to perform work.c. Electric energy is transferred by an insulator which produces electrical power for heat to operate machines.d. Electric power increases electrical energy when transferred through a resistor in a circuit.

Phy.2.3.5 Analyze systems with multiple potential differences and resistors connected in series and parallel circuits, both conceptually and mathematically, in terms of voltage, current and resistance.

90. The diagram represents a DC circuit.

What is the voltage of the battery when the ammeter reads 4.0 amperes?

a. 0.22 Vb. 1.0 Vc. 4.5 Vd. 16 V

91. The diagram represents a DC circuit.

The total resistance of the circuit is 10.5 Ω. R2 and R3 each has the same resistance of 5.0 Ω. What is R1?

a. 4.0 Ω b. 5.0 Ω c. 8.0 Ω d. 10.0 Ω

92. The diagram represents a DC circuit. What is the total resistance of the circuit?

a. 25 Ωb. 28 Ωc. 39 Ωd. 58 Ω

93. What is the equivalent resistance of a 4.0-Ω resistor, a 5.0-Ω resistor and a 6.0-Ω connected in parallel? a. 0.62 Ω b. 5.0 Ω c. 1.64 Ω d. 3.5 Ω

94. A student wants to measure the current flowing through and the voltage across R1 in the circuit. Which configuration is correct?

Phy.3.1.1 Explain qualitatively the fundamental properties of the interactions of charged objects.

95. A student combs his hair with a plastic comb, and the hair becomes positively charged. What is the net charge of the comb and the hair and the direction of the charge transfer?

a. Protons move from the comb to the hair, and the total charge of the hair and the comb is zero.b. Electrons move from the hair to the comb, and the total charge of the hair and the comb is zero.c. Protons move from the comb to the hair, and the total charge of the hair and the comb is positive.d. Electrons move from the hair to the comb, and the total charge of the hair and the comb is negative.

96. Explain why small pieces of paper are attracted to a comb that has been rubbed through hair.

97. What does it mean to say that “charge is conserved in a closed system”? Your answer should include an example electrostatic system and explanation of the interaction.

Phy.3.1.2 Explain the geometries and magnitudes of electric fields.

98. Which is true about electric field lines? a. They form a counter-clockwise circle around positive charges. b. They form a clockwise circle around positive charges. c. They radiate outward from negative charges. d. They radiate outward from positive charges.

99. What determines the strength of an electric field?

Phy.3.1.3 Explain how Coulomb’s law relates to the electrostatic interactions among charged objects.

100. What is the electrostatic force of attraction between a proton and an electron that are separated by 3.25 x 10 -7 m? a. 1.0 x 10-7N b. 1.5 x 10-7N c. -1.8 x 10-15 N d. -2.2 x10-15N

101. The diagram represents three charged particles arranged in a line.

Describe the forces acting on particle 3 and calculate the magnitude and direction of the net force. Explain your calculations.

102. Two charged particles are 0.080 m apart. They are moved until the force between them is 16 times greater. How far apart are the charges?

a. 0.0050 mb. 0.020 mc. 0.040 md. 0.16 m

Phy.3.1.4 Explain the mechanisms for producing electrostatic charges, including charging by friction, conduction, and induction.

103. What will be the effect of a negatively charged rod touching a neutral electroscope?

a. The leaves will fall. b. The electroscope will become positively charged. c. There will be no change. d. The leaves will spread apart.

104. How does charging by conduction and induction occur during a thunderstorm? Explain your answer.

Phy.3.1.5 Explain how differences in electrostatic potentials relate to the potential energy of charged objects.

105. The electric field intensity between two charged plates is 3.00 x 104 N/C. The plates are 0.0820 m apart. What is the electric potential difference between the plates?

a. 1.50 x 103 V b. 1.75 x 103 V c. 1.89 x 103 V d. 2.46 x 103 V

106. The diagram shows a positive test charge near a positive point charge.

What happens if a positive test charge moves from point A to point B in the electric field? Explain your answer in reference to: potential energy, electric potential and force.

Phy.3.2.1 Explain the relationship between magnetic domains and magnetism.

107. Explain how an un-magnetized iron bar becomes magnetized when placed in a magnetic field. Your answer should include a diagram to illustrate magnetic domains and an explanation of their origin.

Phy.3.2.2 Explain how electric currents produce various magnetic fields.

108. The diagram shows the magnetic field around a current bearing wire.

Explain the relationship between the electric current in the wire and the magnetic field (both magnitude and direction).

109. If the current in a wire is doubled, what happens to the strength of the magnetic field?

a. Magnetic field strength is half of the original value. b. Magnetic field strength is one-third of the original value. c. Magnetic field strength is the same. d. Magnetic field strength is double the original value.

Phy.3.2.3 Explain how transformers and power distributions are application of electromagnetism.

110. The diagram represents a simple transformer. Explain how a step-down transformer is used to change the voltage of power lines from 220 kV to an output voltage of 110V for electrical outlets inside homes.

111. How does the magnetized strip on the credit card work? Explain your answer.

112. Explain the process of electromagnetic induction involved in electric generators.