7th Chapter 9 Electricty

Particles that attract each other are

• two electrons.

• two protons.

• one proton and one electron.

• one proton and one neutron

Ohm's law is NOT related to

• current.

• mass.

• resistance.

• voltage.

One source of electric energy for an electric circuit is a

• battery.

• lightbulb.

• switch.

• wire.

The measure of energy transformed between two points in an electric circuit is

• resistance.

• voltage.

• electric current.

• electric force.

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The switch in a circuit breaker opens when which of the following in the circuit becomes too high?

• current

• resistance

• static charge

• total charge

The electric force between two charges increases when

• both charges become negative.

• both charges become positive.

• the charges get closer together.

• the charges get farther apart.

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Which best describes an electrically charged object?

• an electron without static charge

• an object that has gained or lost electrons

• an object that has gained or lost neutrons

• a proton without static charge

In the figure, what form of energy in the battery is being converted to electric energy?

• chemical

• light

• nuclear

• thermal

What property of a wire changes when the wire is made thicker?

• current

• resistance

• static charge

• total electric charge

An electric field surrounds

• an electron

• a neutron

• both an electron and a neutron

• neither an electron nor a neutron

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