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Chapter 20 Review Chapter 20 Review activity!activity!

Fun in B208!Fun in B208!

A. Unit of energy B. Unit of charge C. Unit of current D. Unit of voltage.

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What is a coulomb?

A. current. B. voltage. C. power D. conductance

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The motion of charges in wires is best called electric:

A. current. B. voltage. C. power D. resistance.

4

An ohm is the unit of measurement for:

A. current. B. voltage. C. power D. resistance.

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An amp is the unit of measurement for:

A. is on

B. is off

C. is left behind

D. is Ohm’s Law

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An open circuit:

A. a store at the mall. B. potential difference. C. flowing charges. D. resistance.

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The term current refers to:

A. a store at the mall. B. potential energy. C. flowing charges. D. resistance.

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The term voltage refers to:

A. a store at the mall. B. potential energy. C. flowing charges. D. resisting the flow of current.

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The term resistance refers to:

A. an absorber. B. a conductor. C. a semiabsorber. D. an insulator.

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Electrical current will not pass easily through:

A. positively charged B. negatively charged C. neutral D. none of the above

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An object with equal positive and negative charge is?

A. It increases B. It decreases C. It stays the same D. There is no current

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If voltage increases, what happens to current?

A. It increases B. It decreases C. It stays the same D. There is no current

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If resistance increases, what happens to current?

A. I = V/R B. V=IR C. R=V/I D. all of these

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What is Ohm’s Law?

A. 10 B. 15 C. 0.067 D. 960

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If 8.0 amperes of current flows with a voltage of 120 volts what is the resistance?

I = V/R

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In the circuit below, 8 amperes of current passes through the light bulb. The resistance of the light bulb is 2 ohms. What is the voltage of the battery?

A. 16 Volts B. 4 Volts C. 32 Volts D. None of these

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A light is plugged into a 120-volt outlet. If it has a resistance of 360 ohms, how much current does it use?

A. 3 amps B. 42300 amps C. 0.33 amps D. None of these

Switches 2 and 3 are open, and all others are closed. What devices are on?

A B C D E F G

Switches 4 and 6 are open, and all others are closed. What devices are on?

A B C D E F G