Review Motors, Generators, & Resources

A generator is

• a device that spins when exposed to wind

• a device that conducts electrical current through a wire

• a device that converts mechanical motion into electricity

When an electric current runs through a wire, a magnetic field is induced

• under the wire

• above the wire

• around the wire

• through the wire

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which appliance is most likely to use an electromagnetic motor in it?

• refrigerator

• blender

• doorbell

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How long does it take for fossil fuels to form?

• Hundreds of years

• Thousands of years

• Millions of years

• Can vary depending on soil and rock formations

The first energy change in an electric motor occurs when a battery's chemical energy becomes ___________ energy.

• electromagnetic

• kinetic

• electrical

When using the electric motor, how do you know if it is working?

• The light goes on.

• The shaft rotates.

• The motor gets hot.

Where are the brushes located in an electric motor?

• in the electromagnet

• in the cap

• in the casing

Motor or generator?

• motor

• generator

• neither

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In a generator, __________ energy is converted to _____________ energy.

• electromagnetic, electrical

• mechanical, electrical

• mechanical, thermal

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The wires in a motor are make a connection with the ______________.

• coils of wire

• commutator

• brushes

• electromagnets