Question 1

The electric force between charges depends on the

Accepted Answer

A)  magnitude of electric charges.
B)  separation distance between electric charges.
C)  both of these
D)  none of the above

Question 2

An electrically polarized object normally has

Accepted Answer

A)  a net charge of zero.
B)  displaced charges.
C)  both of these
D)  none of the above

Question 3

Heat a copper wire and its electrical resistance

Accepted Answer

A)  decreases.
B)  remains unchanged.
C)  increases.

Question 4

The number of electrons delivered daily by power utilities to an average American home during a typical week is

Accepted Answer

A)  zero.
B)  110.
C)  220.
D)  billions of billions.
E)  none of the above

Question 5

The source of electrons in an ordinary electric circuit is

Accepted Answer

A)  a dry cell,wet cell,or battery.
B)  usually a wall socket.
C)  a generator at the power station.
D)  the electric conductor itself.
E)  none of the above

Question 6

Charge carriers in a metal are electrons rather than protons because electrons are

Accepted Answer

A)  negative.
B)  smaller.
C)  loosely bound.
D)  all of the above
E)  none of the above

Question 7

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

Accepted Answer

A)  1 ohm
B)  60 ohms
C)  100 ohms
D)  144 ohms
E)  none of the above

Question 8

The equivalent resistance of any parallel branch in a circuit is

Accepted Answer

A)  often less than the resistance of the lowest resistor.
B)  always less than the resistance of the lowest resistor.
C)  usually half the value of the lowest resistor.
D)  none of the above

Question 9

Which has the thicker lamp filament,a 60-W incandescent bulb or a 100-W incandescent bulb?

Accepted Answer

The 100-W bulb has less resistance and a...

Question 10

More toll booths on a highway is analogous to a

Accepted Answer

A)  series circuit.
B)  parallel circuit.
C)  complex combination of both of these

Question 11

What are the similarities and differences between Coulomb's law and Newton's law of gravitation?

Accepted Answer

Similarities: Both laws are inverse-squa...

Question 12

The amount of energy given to each coulomb of charge flowing through a 12-V battery is

Accepted Answer

A)  12 J.
B)  12 A.
C)  12 V.
D)  all of the above
E)  none of the above

Question 13

Which has the larger resistance,a 60-W or a 100-W incandescent lamp,both rated for 120-V operation?

Accepted Answer

A)  60-W lamp
B)  100-W lamp
C)  both the same

Question 14

A pair of 1-ohm resistors connected in series is 2 ohms,and when connected in parallel is

Accepted Answer

A)  1/2 ohm.
B)  1 ohm.
C)  also 2 ohms.
D)  none of the above

Question 15

Much of the charge on a conducting cube is

Accepted Answer

A)  uniformly spread over its surface.
B)  partly beneath the surface.
C)  mutually repelled toward its corners.
D)  none of the above

Question 16

If you plug a 110-V electric toaster into a 220-V outlet,current in the toaster will be about

Accepted Answer

A)  half what is should be.
B)  the same as if it were plugged into a 110-V outlet.
C)  more than twice what it should be.
D)  twice what it should be.

Question 17

A pair of 1-ohm resistors connected in parallel has a combined resistance of

Accepted Answer

A)  1 ohm.
B)  2 ohms.
C)  1/2 ohm.
D)  none of the above

Question 18

As more lamps are put into a series circuit,the overall current in the power source

Accepted Answer

A)  increases.
B)  decreases.
C)  stays the same.

Question 19

Just as water flows from high to low pressure,electric charge flows from

Accepted Answer

A)  high to low voltage.
B)  high charge concentration to low charge concentration.
C)  high resistance to low resistance.
D)  all of the above
E)  none of the above

Question 20

When you remove electrons from a metal cup,the cup becomes

Accepted Answer

A)  negatively charged.
B)  positively charged.
C)  ionized.

Exam 8: Static and Current Electricity

Which has the thicker lamp filament,a 60-W incandescent bulb or a 100-W incandescent bulb?

Correct AnswerverifiedThe 100-W bulb has less resistance and a...View AnswerShow Answer

More toll booths on a highway is analogous to a

Correct AnswerverifiedShow Answer

Much of the charge on a conducting cube is

Correct AnswerverifiedShow Answer

Charge carriers in a metal are electrons rather than protons because electrons are

Correct AnswerverifiedShow Answer

A pair of 1-ohm resistors connected in series is 2 ohms,and when connected in parallel is

Correct AnswerverifiedShow Answer

The amount of energy given to each coulomb of charge flowing through a 12-V battery is

Correct AnswerverifiedShow Answer

Which has the larger resistance,a 60-W or a 100-W incandescent lamp,both rated for 120-V operation?

Correct AnswerverifiedShow Answer

As more lamps are put into a series circuit,the overall current in the power source

Correct AnswerverifiedShow Answer

A pair of 1-ohm resistors connected in parallel has a combined resistance of

Correct AnswerverifiedShow Answer

The electric force between charges depends on the

Correct AnswerverifiedShow Answer

Heat a copper wire and its electrical resistance

Correct AnswerverifiedShow Answer

When you remove electrons from a metal cup,the cup becomes

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An electrically polarized object normally has

Correct AnswerverifiedShow Answer

Just as water flows from high to low pressure,electric charge flows from

Correct AnswerverifiedShow Answer

The number of electrons delivered daily by power utilities to an average American home during a typical week is

Correct AnswerverifiedShow Answer

The source of electrons in an ordinary electric circuit is

Correct AnswerverifiedShow Answer

The equivalent resistance of any parallel branch in a circuit is

Correct AnswerverifiedShow Answer

If you plug a 110-V electric toaster into a 220-V outlet,current in the toaster will be about

Correct AnswerverifiedShow Answer

What are the similarities and differences between Coulomb's law and Newton's law of gravitation?

Correct AnswerverifiedSimilarities: Both laws are inverse-squa...View AnswerShow Answer

Correct Answer
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The 100-W bulb has less resistance and a...
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Similarities: Both laws are inverse-squa...
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