Energy

Which of the following materials is a conductor?

• rubber

• chalk

• gold

• glass

What is one use for 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.

What will happen in a parallel circuit if one of its loops is broken?

• electric current will not flow through any of the loops.

• electric current will still flow through the broken loop.

• electric current will still flow through the unbroken loops.

• the energy source will stop providing energy to move the electric charges.

A washing machine is an example of transforming

• electricity into motion energy.

• motion energy into electric energy.

• electricity into light.

• heat into motion energy.

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Which of the following is caused by the energy of motion?

• resistor

• friction

• conductor

• filament

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One example of a resistor is

• a power cord.

• a parallel circuit.

• a battery.

• a filament.

Which of the following uses resistors to transform electricity into heat?

• a toaster

• a car engine

• a gas stove

• a wind turbine

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In a simple series circuit design what would happen if a rubber eraser was placed between the battery and one of the wires connected to it.

• It would still work the same.

• The battery wouldn't put off an electrical charge.

• The wires would carry electric current past the rubber eraser.

• Electric current would no longer flow through the circuit, because the eraser would act as an insulator and stop the flow of electrical current. The light bulb wouldn't work since the loop is broken.

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In a flashlight the light bulb would be a

• resistor converting electricity into light energy.

• insulator.

• wire.

• switch.