Conceptual physics fundamentals 1st edition hewitt test bank

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Exam Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) When a light switch is turned on in a dc circuit, the average speed of electrons in the lamp is A) less than 1 cm/s.

B) the speed of sound waves in metal.

C) 1000 cm/s.

D) the speed of light.

E) dependent on how quickly each electron bumps into the next electron.

Answer: A Explanation:

A) B) C) D) E)

2) A power line with a resistance of 2 ohms has a current of 80 A in it. The power dissipated in the line is A) 160 W. B) 320 W. C) 12,800 W. D) 40 W. E) none of these Answer: C Explanation:

2)

A) B) C) D) E)

3) Charge carriers in a metal are electrons rather than protons because electrons are A) negative.

B) loosely bound.

C) smaller.

D) all of these.

E) none of these.

Answer: B Explanation:

1)

A) B) C) D) E)

1

3)

4) Electric potential, measured in volts, is the ratio of electric energy to amount of electric A) charge.

B) current.

C) resistance.

D) voltage.

E) None of the above choices are correct.

Answer: A Explanation:

A) B) C) D) E)

5) In a common dc circuit, electrons move at speeds of A) the speed of light.

B) the speed of a sound wave.

C) many centimeters per second.

D) a fraction of a centimeter per second.

E) none of these Answer: D Explanation:

5)

A) B) C) D) E)

6) Every proton in the universe is surrounded by its own A) electric field and gravitational field.

B) gravitational field.

C) electric field D) None of the above choices are correct..

Answer: A Explanation:

6)

A) B) C) D)

7) There are electrons in the filament of the ac lamp in your bedroom. When you turn on the lamp and it glows, the glowing comes from A) different electrons; the ones that flow in the circuit to your lamp.

B) the positive charges that flow in the filament.

C) the same electrons.

Answer: C Explanation:

4)

A) B) C)

2

7)

8) The number of electrons delivered daily to an average American home by an average power utility in the mid 1980s was A) 220.

B) zero.

C) 110.

D) billions of billions.

E) none of these Answer: B Explanation:

A) B) C) D) E)

9) The direction of an electric field is the direction of the force that the field would exert on A) a neutral test charge.

B) a molecule.

C) an atom.

D) a proton.

E) an electron.

Answer: D Explanation:

D) none of these

11)

A) B) C) D)

12) Stretch a copper wire so that it is thinner and the resistance between its ends A) remains unchanged.

B) decreases.

C) increases.

Answer: C Explanation:

10)

A) B) C) D)

11) In a simple circuit containing a bulb, energy is given to the moving charges by A) a generator.

B) the bulb.

C) the wires.

Answer: A Explanation:

9)

A) B) C) D) E)

10) The headlights, radio, and defroster fan in an automobile are connected in A) series without separate switches.

B) series with a switch for each.

C) parallel with a switch for each.

D) parallel without separate switches.

Answer: C Explanation:

8)

A) B) C)

3

12)

13) An uncharged pith ball is suspended by a nylon fiber. When a negatively charged rubber rod is brought nearby, without touching it, the pith ball A) becomes polarized.

B) is repelled by the rod.

C) becomes charged by induction.

D) in unaffected.

E) None of the above choices are correct.

Answer: A Explanation:

A) B) C) D) E)

14) A positive charge and a negative charge held near each other are released. As they move, the force on each particle A) decreases.

B) stays the same.

C) increases.

Answer: C Explanation:

15)

A) B) C) D)

16) A positive ion has more A) neutrons than protons.

B) protons than electrons.

C) protons than neutrons.

D) electrons than neutrons.

E) electrons than protons.

Answer: B Explanation:

14)

A) B) C)

15) Normally a small party balloon charged to several thousand volts will have a relatively small amount of A) charge and energy.

B) energy.

C) charge D) neither charge or energy.

Answer: A Explanation:

13)

16)

A) B) C) D) E)

4

17) Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have A) less resistance.

B) more resistance.

C) the same resistance.

Answer: A Explanation:

A) B) C)

18) A circuit breaker often serves the same purpose as a A) capacitor.

B) fuse.

C) battery D) All of the above choices are correct.

E) None of the above choices are correct.

Answer: B Explanation:

20)

A) B) C)

21) An electrical diode is useful for A) voltage modification.

B) boosting voltage.

C) storing electrical energy.

D) limiting current.

E) changing ac to dc.

Answer: E Explanation:

19)

A) B) C)

20) If you comb your hair and the comb becomes positively charged, then your hair becomes A) negatively charged.

B) uncharged.

C) positively charged.

Answer: A Explanation:

18)

A) B) C) D) E)

19) Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will carry A) more current.

B) less current.

C) the same current.

Answer: A Explanation:

17)

21)

A) B) C) D) E)

5

22) Electrons are made to flow in a wire when there is A) more potential energy at one end of the wire than the other.

B) a potential difference across its ends.

C) an imbalance of charges in the wire.

Answer: B Explanation:

A) B) C)

23) In an electrically neutral atom the number of protons in the nucleus is equal to the number of A) neutrons in the nucleus.

B) electrons that surround the nucleus.

C) Choices A and B are both correct.

D) Choices A and B are both incorrect.

Answer: B Explanation:

24)

A) B) C) D) E)

25) A conductor differs from an insulator in that a conductor A) has faster moving molecules.

B) has more energy than an insulator.

C) has more protons than electrons.

D) has more electrons than protons.

E) none of these Answer: E Explanation:

23)

A) B) C) D)

24) A heater uses 20 A when used in a 110-V line. If electric power costs 10 cents per kilowatt hour, the cost of running the heater for 10 hours is A) $5.50.

B) $2.20.

C) $0.55.

D) $0.22.

E) none of these Answer: B Explanation:

22)

A) B) C) D) E)

6

25)

26) If you use 10 J of work to push a coulomb of charge into an electric field, its voltage with respect to its starting position is A) 10 V. B) less than 10 V. C) more then 10 V. D) None of the above choices are correct.

Answer: A Explanation:

A) B) C) D)

27) A difference between electric forces and gravitational forces is that gravitational forces are not affected by A) separation distance.

B) the inverse square law.

C) repulsive interaction.

D) infinite range.

E) None of the above choices are correct.

Answer: C Explanation:

28)

A) B) C) D)

29) When two lamps are connected in parallel to a battery, the electrical resistance that the battery senses is A) more than the resistance of either lamp.

B) less than the resistance of either lamp.

C) none of these Answer: B Explanation:

27)

A) B) C) D) E)

28) The electrical force between charges depends only on the the charges A) separation distance B) magnitude .

C) magnitude and separation distance.

D) None of the above choices are correct.

Answer: C Explanation:

26)

A) B) C)

7

29)

30) Which force binds atoms together to form molecules?

A) electrical B) nuclear C) centripetal D) gravitational E) none of these Answer: A Explanation:

A) B) C) D) E)

31) To say that electric charge is conserved means that no case has ever been found where the A) net charge has been created or destroyed.

B) total charge on an object has changed.

C) total amount of charge on an object has increased.

D) net amount of negative charges on an object is unbalanced by positive charge on another object.

E) None of the above choices are correct.

Answer: A Explanation:

32)

A) B) C)

33) The electrical force between charges is strongest when the charges are A) far apart.

B) close together.

C) The electric force is constant everywhere.

Answer: B Explanation:

31)

A) B) C) D) E)

32) Two lamps, one with a thick filament and one with a thin filament of the same material, are connected in series to a battery. The voltage is greater across the lamp with the A) thin filament.

B) thick filament.

C) Voltage is the same for both.

Answer: A Explanation:

30)

A) B) C)

8

33)

34) Strip electrons from an atom and the atom becomes a A) molecule.

B) negative ion.

C) positive ion.

D) different element.

Answer: C Explanation:

A) B) C) D)

35) The fundamental force underlying all chemical reactions is A) nuclear.

B) electrical.

C) gravitational.

D) centripetal.

E) None of the above choices are correct..

Answer: B Explanation:

36)

A) B) C)

37) The power dissipated in a 4-ohm resistor carrying 3 A is A) 48 W. B) 36 W. C) 7 W. D) 18 W. E) not enough information to say Answer: B Explanation:

35)

A) B) C) D) E)

36) Compared to the filament thickness of a 60-W light bulb, the filament of a 100-W light bulb will be A) thinner.

B) thicker.

C) the same.

Answer: B Explanation:

34)

A) B) C) D) E)

9

37)

38) In an ac circuit, the electric field A) is everywhere the same.

B) changes magnitude and direction with time.

C) increases via the inverse square law.

D) is non-existent.

E) none of these Answer: B Explanation:

38)

A) B) C) D) E)

39) Compared to a single lamp connected to a battery, two identical lamps connected in series to the same battery will carry A) less current.

B) more current.

C) the same current.

Answer: A Explanation:

A) B) C)

40) Two protons attract each other gravitationally and repel each other electrically. By far the greater force is A) the gravitational attraction.

B) the electrical repulsion.

C) neither the forces are the same.

Answer: B Explanation:

41)

A) B) C) D)

42) The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?

A) 20 N/C B) 120 N/C C) 60 N/C D) 30 N/C E) 240 N/C Answer: D Explanation:

40)

A) B) C)

41) A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?

A) proton B) electron C) Both accelerate equally.

D) Neither accelerates.

Answer: B Explanation:

39)

A) B) C) D) E)

10

42)

43) A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then A) negatively charged.

B) positively charged.

C) partially discharged.

D) completely discharged.

E) discharged only on the side touched.

Answer: B Explanation:

A) B) C) D) E)

44) Assume that 10 J of work is needed to push a charge, at rest, into an electric field. After the charge is released there, it flies back to its starting position and its kinetic energy there will be A) 5 J. B) zero.

C) 10 J. D) more than 10 J. E) impossible to predict without additional information.

Answer: C Explanation:

45)

A) B) C)

46) A 10-ohm resistor has a 5-A current in it. What is the voltage across the resistor?

A) 5 V B) 20 V C) 10 V D) 15 V E) more than 20 V Answer: E Explanation:

44)

A) B) C) D) E)

45) A 60-W light bulb and a 100-W light bulb are connected in series to a 120 V outlet. Which light bulb has more current in it?

A) the 100-W bulb B) the 60-W bulb C) Both have the same current.

Answer: C Explanation:

43)

A) B) C) D) E)

11

46)

47) An electric heater is rated at 300 W when used in a 110-V circuit. The safety fuse in the circuit can handle 15 A of current. How many heaters can be safely operated in the circuit?

A) 5 B) 3 C) 4 D) 2 E) more than 5 Answer: A Explanation:

A) B) C) D) E)

48) The current through a 10-ohm resistor connected to a 120-V power supply is A) 1 A. B) 12 A. C) 10 A. D) 120 A. E) none of these Answer: B Explanation:

49)

A) B) C) D) E)

50) As more lamps are put into a series circuit, the overall current in the power source A) stays the same.

B) decreases.

C) increases.

Answer: B Explanation:

48)

A) B) C) D) E)

49) Two charges separated by one meter exert 1-N forces on each other. If the magnitude of each charge is doubled, the force on each charge is A) 4 N. B) 8 N. C) 2 N. D) 1 N. E) None of the above choices are correct.

Answer: A Explanation:

47)

A) B) C)

12

50)

51) Two charged particles held near each other are released. As they move, the acceleration of each decreases. Therefore, the particles have A) the same sign.

B) opposite signs.

C) not enough information given Answer: A Explanation:

A) B) C)

52) Two charges separated by one meter exert 1-N forces on each other. If the charges are pushed to 1/4 meter separation, the force on each charge will be A) 4 N. B) 1 N. C) 8 N. D) 2 N. E) 16 N. Answer: E Explanation:

53)

A) B) C) D) E)

54) The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron is A) four times as much.

B) half as much.

C) the same.

D) twice as much.

E) None of the above choices are correct.

Answer: E Explanation:

52)

A) B) C) D) E)

53) Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be A) F/2.

B) 2 F. C) F. D) F/4.

E) none of these Answer: C Explanation:

51)

A) B) C) D) E)

13

54)

55) After a capacitor is fully charged, the total number of electrons it contains A) is much less.

B) is slightly less.

C) is slightly greater.

D) is much greater.

E) remains unchanged.

Answer: E Explanation:

A) B) C) D) E)

56) When a car is struck by lightning, the resulting electric field inside the car is A) zero.

B) normally huge for a time longer than the lightning stroke itself.

C) small enough to be safe for an occupant inside.

D) normally huge, but for a brief time.

Answer: A Explanation:

57)

A) B) C) D) E)

58) To say that electric charge is quantized is to say that the charge on an object A) is sometimes positive.

B) will interact with neighboring electric charges.

C) may occur in an infinite variety of quantities.

D) is a whole-number multiple of the charge of one electron.

E) can be neither created nor destroyed.

Answer: D Explanation:

56)

A) B) C) D)

57) The ratio of the potential difference across a metallic conductor to the current in the conductor is known as A) resistance.

B) electromagnetic force.

C) potential drop.

D) conductivity.

E) None of the above choices are correct.

Answer: A Explanation:

55)

A) B) C) D) E)

14

58)

59) An ampere is a unit of electrical A) resistance.

B) current.

C) pressure.

D) all of these E) none of these Answer: B Explanation:

59)

A) B) C) D) E)

60) Two lamps, one with a thick filament and one with a thin filament of the same material, are connected in parallel to a battery. The current is larger in the lamp with the A) thin filament.

B) thick filament.

C) Current is the same in both.

Answer: B Explanation:

A) B) C)

61) Superconductors are noted for their A) bright colors.

B) absence of electric resistance.

C) low cost.

D) high electric resistance.

E) low electric resistance.

Answer: B Explanation:

61)

A) B) C) D) E)

62) A main difference between gravitational and electric forces is that electrical forces A) act over shorter distances.

B) obey the inverse-square law.

C) repel or attract.

D) attract.

E) are weaker.

Answer: C Explanation:

60)

A) B) C) D) E)

15

62)

63) Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is A) actually more.

B) the same.

C) often less.

D) definitely less.

E) incredibly, all of these.

Answer: B Explanation:

A) B) C) D) E)

64) A capacitor is used to store A) both charge and energy.

C) charge.

Answer: A Explanation:

B) energy.

D) neither charge or energy.

65)

A) B) C)

66) Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be A) F. B) 2 F. C) F/4.

D) F/2.

E) none of these Answer: D Explanation:

64)

A) B) C) D)

65) As more lamps are put into a parallel circuit, the overall current in the power source A) increases.

B) stays the same.

C) decreases.

Answer: A Explanation:

63)

A) B) C) D) E)

16

66)

67) The unit of electric charge, the coulomb, is the charge on A) a specific number of neutrons.

B) a neutron.

C) a quark.

D) a specific large number of electrons.

E) one electron.

Answer: D Explanation:

A) B) C) D) E)

68) A circuit is powered with a battery. Charge flows A) through both the battery and the rest of the circuit.

B) from the negative battery terminal to the positive terminal.

C) out of the battery and into the circuit.

D) only after a couple seconds pass.

E) none of these Answer: A Explanation:

69)

A) B) C)

70) When a single charge q is placed at one corner of a square, the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square, the electric field at the center of the square due to these three equal charges is A) F/(2q).

B) 4F/q.

C) F/q.

D) F/(4q).

E) None of the above choices are correct.

Answer: C Explanation:

68)

A) B) C) D) E)

69) An electron and a proton A) attract each other.

B) repel each other.

C) neither attract or repel each other.

Answer: A Explanation:

67)

A) B) C) D) E)

17

70)

71) A sphere has a negative charge of 6.4 × 10-7 coulomb. The approximate number of electrons that must be removed to make the sphere neutral is A) 1.6 × 10-8 .

B) 6.4 × 1026 .

C) 9.8 × 103 .

D) 4.0 × 1012 .

Answer: D Explanation:

A) B) C) D)

72) Two lamps, one with a thick filament and one with a thin filament, are connected in parallel to a battery. The voltage is greatest across the lamp with the A) thick filament.

B) thin filament.

C) Both voltages are the same.

Answer: C Explanation:

C) remains unchanged.

74)

A) B) C) D) E)

75) The electric field inside the dome of a Van de Graaff generator A) depends on the volume of the dome B) depends on the amount of charge the outside of dome.

C) Choices A and B are both correct.

D) None of the above choices are correct..

Answer: D Explanation:

73)

A) B) C)

74) A transistor is an example of a A) resistor.

B) semiconductor.

C) superconductor.

D) transmitter.

E) dry cell.

Answer: B Explanation:

72)

A) B) C)

73) Heat a copper wire and its electric resistance A) decreases.

B) increases.

Answer: B Explanation:

71)

A) B) C) D)

18

75)

76) Alternating current is normally produced by a A) battery.

B) generator.

Answer: B Explanation:

C) both of these

D) neither of these

A) B) C) D)

77) The primary source of electrons in an ordinary electrical circuit is A) the power station generator.

B) a dry cell, wet cell or battery.

C) the electrical circuit itself.

D) the back emf of motors.

E) none of these Answer: C Explanation:

77)

A) B) C) D) E)

78) An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is A) 0.5 V. B) 0.25 V. C) 1 V. D) 2 V. E) 4 V. Answer: C Explanation:

79)

A) B) C) D) E)

80) In an electric circuit, the safety fuse is connected to the circuit in A) series.

B) parallel.

Answer: A Explanation:

78)

A) B) C) D) E)

79) A woman experiences an electrical shock. The electrons making the shock come from the A) electric field in the air.

B) power plant.

C) hairdryer.

D) woman's body.

E) ground.

Answer: D Explanation:

76)

A) B) C)

19

C) either series or parallel.

80)

81) Modern automobile headlights are connected in A) series.

B) perpendicular.

Answer: C Explanation:

C) parallel.

D) none of these

A) B) C) D)

82) If you plug an electric toaster rated at 110 V into a 220-V outlet, the current in the toaster will be about A) twice what it should be.

B) more than twice what it should be.

C) half what it should be.

D) the same as if it were plugged into 110 V. Answer: A Explanation:

84)

A) B) C) D)

85) A wire carrying a current is normally charged A) negatively.

B) positively.

Answer: C Explanation:

83)

A) B) C) D) E)

84) Which statement is correct?

A) Charge flows in a closed circuit.

B) Current is the primary cause of voltage.

C) Voltage flows through an open or a closed circuit.

D) Resistance flows though an open circuit.

Answer: A Explanation:

82)

A) B) C) D)

83) Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be A) 0.11 N. B) 9 N. C) 0 N. D) 0.33 N. E) 3 N. Answer: A Explanation:

81)

C) not at all.

A) B) C)

20

85)

86) A 100-Watt lamp glows brighter than a 25-Watt lamp. The electrical resistance of the 100-Watt lamp must be A) greater.

B) the same.

C) less.

Answer: C Explanation:

A) B) C)

87) Two lamps, one with a thick filament and one with a thin filament, are connected in series. The current is greater in the lamp with the A) thin filament.

B) thick filament.

C) the same in each lamp Answer: C Explanation:

88)

A) B) C) D) E)

89) To say that an object is electrically polarized is to say A) its internal electric field is zero.

B) its charges have been rearranged.

C) it is only partially conducting.

D) it is to some degree magnetic.

E) it is electrically charged.

Answer: B Explanation:

87)

A) B) C)

88) What condition must exist between two points in a conductor in order to maintain a flow of charge A) a switch connected in series.

B) a high resistance.

C) a steady magnetic field.

D) All of the above choices are correct.

E) None of the above choices are correct.

Answer: E Explanation:

86)

A) B) C) D) E)

21

89)

90) Two charged particles held close to each other are released. As the particles move, the velocity of each increases. Therefore, their charges have A) opposite signs.

B) the same sign.

C) either the same or opposite signs.

D) impossible to answer without additional information Answer: C Explanation:

A) B) C) D)

91) The net charge on a charged capacitor depends on A) the distance between the capacitor plates.

B) the area of the capacitor plates.

C) the medium between the capacitor plates.

D) All of the above choices are correct.

E) None of the above choices are correct the net charge is zero.

Answer: E Explanation:

92)

A) B) C)

93) When a 10-V battery is connected to a resistor, the current in the resistor is 2 A. What is the resistor's value?

A) 5 ohms B) 20 ohms C) 2 ohms D) 10 ohms E) more than 20 ohms Answer: A Explanation:

91)

A) B) C) D) E)

92) An electroscope is charged positively as shown by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves A) fall closer together.

B) spread apart further.

C) do not move.

Answer: A Explanation:

90)

A) B) C) D) E)

22

93)

94) When we say an appliance "uses up electricity," we really are saying that A) electron kinetic energy is changed into heat.

B) current disappears.

C) the main power supply voltage is lowered.

D) electrons are taken out of the circuit and put somewhere else.

E) electric charges are dissipated.

Answer: A Explanation:

A) B) C) D) E)

95) A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces an equivalent resistance of A) 10 ohms.

B) 2.4 ohms.

C) 4 ohms.

D) 5.5 ohms.

E) 5 ohms.

Answer: B Explanation:

96)

A) B) C) D) E)

97) A 60-W light bulb and a 100-W light bulb are each rated at 120 V. Which light bulb has a larger resistance?

A) the 60-W bulb B) the 100-W bulb C) Both have the same resistance.

Answer: A Explanation:

95)

A) B) C) D) E)

96) When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is A) 0.25 A. B) 0.5 A. C) 4 A. D) 2 A. E) more than 4 A. Answer: B Explanation:

94)

A) B) C)

23

97)

98) Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles must have A) the same size.

B) opposite signs.

C) the same mass.

D) the same sign.

E) impossible to answer without additional information Answer: B Explanation:

A) B) C) D) E)

99) Which is more dangerous, touching a faulty 110-volt light fixture, or a Van de Graaff generator charged to 100,000 volts?

A) touching the light fixture B) touching the generator C) Touching both are about equally dangerous.

Answer: A Explanation:

100)

A) B) C) D) E)

101) What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?

A) 100 ohms B) 60 ohms C) 1 ohm D) 144 ohms E) none of these Answer: E Explanation:

99)

A) B) C)

100) The source of electrons lighting an incandescent ac light bulb is A) the source voltage.

B) electrical outlet.

C) the power company.

D) the wire leading to the lamp.

E) atoms in the light bulb filament.

Answer: E Explanation:

98)

A) B) C) D) E)

24

101)

102) A wire that carries an electric current A) is never electrically charged.

B) may be electrically charged.

C) is electrically charged.

Answer: B Explanation:

102)

A) B) C)

103) When two lamps are connected in series to a battery, the electrical resistance that the battery senses is A) more than the resistance of either lamp.

B) less than the resistance of either lamp.

C) none of these Answer: A Explanation:

A) B) C)

104) A highly charged child's balloon is not dangerous because A) its outside surface is positively charged.

B) rubber is not a good conductor of electricity.

C) the potential difference between the balloon and the child's hand is very small.

D) None of the above choices are correct.

Answer: D Explanation:

104)

A) B) C) D)

105) When a pair of 1-ohm resistors are connected in series, their combined resistance is A) 2 ohms, and when in parallel, 1 ohm.

B) 1 ohm, and when connected in parallel, 2 ohms.

C) 2 ohms, and when in parallel, 1/2 ohm.

D) 1/2 ohm, and when in parallel, 2 ohms.

E) none of these Answer: C Explanation:

103)

A) B) C) D) E)

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105)

106) In a 110-volt circuit containing a lamp in series with the voltage source, A) 110 joules of energy are converted to heat and light in the circuit every second.

B) 110 joules of energy are shared among all the coulombs in the circuit at any instant.

C) 110 coulombs of charge flow through the lamp every second.

D) 110 joules of energy are given up by each coulomb of charge making up the current in the circuit.

E) none of the above Answer: D Explanation:

A) B) C) D) E)

107) Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is A) twice as much.

B) half as much.

C) four times as much.

D) the same.

E) None of the above choices are correct.

Answer: D Explanation:

108)

A) B) C) D)

109) When the distance between two charges is halved, the electrical force between the charges A) halves.

B) quadruples.

C) doubles.

D) is reduced by 1/4..

E) None of the above choices are correct.

Answer: B Explanation:

107)

A) B) C) D) E)

108) On some early automobiles both headlights went out when one bulb burned out. The headlights must have been connected in A) parallel.

B) perpendicular.

C) haste.

D) series.

Answer: D Explanation:

106)

A) B) C) D) E)

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109)

110) The electric field inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball is then A) greater than zero.

B) zero.

C) less than zero.

Answer: B Explanation:

A) B) C)

111) A capacitor is useful in A) smoothing pulsed current.

B) increasing the current in a resistor.

C) increasing or decreasing voltage.

D) switching dc to ac in a circuit.

E) boosting the energy output of a circuit.

Answer: A Explanation:

111)

A) B) C) D) E)

112) A coulomb of charge that passes through a 6-volt battery is given A) 6 ohms.

B) 6 watts.

C) 6 joules.

D) 6 newtons.

E) 6 amperes.

Answer: C Explanation:

112)

A) B) C) D) E)

113) If 0.8 A of current flow through a light bulb connected to a 120 V outlet, the power consumed is A) 60 W. B) 12 W. C) 15 W. D) 96 W. E) 120 W. Answer: D Explanation:

110)

A) B) C) D) E)

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113)

114) When a single charge q is placed on one corner of a square, the electric field at the center of the square is F/q. If three other equal charges are placed on the other corners, the electric field at the center of the square due to these four equal charges is A) F/q.

B) F/(2q).

C) F/(4q).

D) 4F/q.

E) None of the above choices are correct.

Answer: E Explanation:

114)

A) B) C) D) E)

Figure 10-A

115) A balloon will stick to a wooden wall if the balloon is charged A) positively.

B) negatively.

C) either positively or negatively.

D) None of the above choices are correct.

Answer: C Explanation:

A) B) C) D)

116) The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb is A) 440 ohms.

B) 22 ohms.

C) 44 ohms.

D) 220 ohms.

E) none of these Answer: D Explanation:

115)

A) B) C) D) E)

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116)

117) Electrons move in an electrical circuit A) by interacting with an established electric field.

B) because the wires are so thin.

C) by colliding with molecules.

D) by being bumped by other electrons.

E) none of these Answer: A Explanation:

117)

A) B) C) D) E)

118) To say that electric charge is conserved is to say that electric charge A) can be neither created nor destroyed.

B) is sometimes negative.

C) may occur in an infinite variety of quantities.

D) will interact with neighboring electric charges.

E) is a whole number multiple of the charge of one electron.

Answer: A Explanation:

118)

A) B) C) D) E)

119) Three resistors, 1-ohm, 2-ohm, and 3- ohm are connected in parallel. If they were connected in series instead their equivalent resistance would be A) 9 times as great.

B) 13 times as great.

C) 7 times as great.

D) 11 times as great.

E) None of the above choices are correct.

Answer: D Explanation:

A) B) C) D) E)

120) Rub electrons from your hair with a comb and the comb becomes A) positively charge.

B) negatively charged.

Answer: B Explanation:

119)

A) B) C)

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C) discharged.

120)

121) You can touch a 100,000-volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of A) polarization.

B) conduction.

C) energy.

D) electric field.

Answer: C Explanation:

A) B) C) D)

122) Connect a pair of lamps in series and you draw current from the connected battery. Connect the same lamps in parallel and you draw A) more current.

B) less current.

C) the same current.

D) sometimes more, sometimes less.

Answer: A Explanation:

122)

A) B) C) D)

123) The electric power of a lamp that carries 2 A at 120 V is A) 2 watts.

B) 1/6 watts.

C) 20 watts.

Answer: D Explanation:

121)

A) B) C) D) E)

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D) 240 watts.

E) 60 watts.

123)

Answer Key Testname: C10

1) A 2) C 3) B 4) A 5) D 6) A 7) C 8) B 9) D 10) C 11) A 12) C 13) A 14) C 15) A 16) B 17) A 18) B 19) A 20) A 21) E 22) B 23) B 24) B 25) E 26) A 27) C 28) C 29) B 30) A 31) A 32) A 33) B 34) C 35) B 36) B 37) B 38) B 39) A 40) B 41) B 42) D 43) B 44) C 45) C 46) E 47) A 48) B 49) A 50) B 31

Answer Key Testname: C10

51) A 52) E 53) C 54) E 55) E 56) A 57) A 58) D 59) B 60) B 61) B 62) C 63) B 64) A 65) A 66) D 67) D 68) A 69) A 70) C 71) D 72) C 73) B 74) B 75) D 76) B 77) C 78) C 79) D 80) A 81) C 82) A 83) A 84) A 85) C 86) C 87) C 88) E 89) B 90) C 91) E 92) A 93) A 94) A 95) B 96) B 97) A 98) B 99) A 100) E 32

Answer Key Testname: C10

101) E 102) B 103) A 104) D 105) C 106) D 107) D 108) D 109) B 110) B 111) A 112) C 113) D 114) E 115) C 116) D 117) A 118) A 119) D 120) B 121) C 122) A 123) D

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