Chapter 3: Electricity

The resistor in an incandescent light bulb is called

• an insulator.

• an electric charge.

• a filament.

• a power source.

Electrical energy is released when

• an object is neutral.

• charged particles move.

• objects repel each other.

• matter changes state.

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NGSS.MS-PS2-3

A material through which an electric charge can move easily is a(n)

• resistor.

• insulator.

• filament.

• conductor.

Which of the following is a device that uses a resistor to transform electrical energy into light and heat?

• a radio

• a telephone

• a printer

• a toaster

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NGSS.MS-PS3-3

Which of the following are needed to complete an electric circuit?

• resistor

• wire

• energy source

• all of the above

Which of these materials is a conductor?

• rubber

• chalk

• gold

• glass

What is one use of an insulator?

• It slows down the flow of electric current to produce heat and light.

• It stores electric energy for later use.

• It allows electric current to flow through it.

• It makes electrically charged objects safe to handle.

Electric current cannot flow in a series circuit if

• the circuit contains an insulator.

• there is a break in the circuit.

• the circuit contains a resistor.

• the circuit has only one loop in it.

A washing machine is an example of transforming

• electricity into light.

• motion energy into electric energy.

• electricity into motion energy.

• heat into motion energy.

One example of a resistor is

• a power cord.

• a parallel circuit.

• a battery.

• a filament.