Electric motors

What do electric motors do?

• Convert electricity to movement

• Convert magnetism to electricity

• Convert north poles to south poles in magnets

• Continually store electricity for later use

The electromagnets that are turned on in a motor attract or repel the permanent magnets that are in the casing.

• True

• False

When the electromagnets rotate, the commutator is in a new position and one section will turn off while another turn on

• True

• False

What type of equipment has electromagnets?

• generator

• motor

• both

What type of equipment transfers energy from electrical energy to kinetic energy?

• generator

• motor

• both

What type of equipment has permanent magnets?

• generator

• motor

• both

What type of equipment transfers kinetic energy to electrical energy?

• generator

• motor

• both

Which of the following will produce the strongest electromagnet?

• A coil of 20 turns of wire

• A coil of 20 turns of wire

• A coil of 30 turns of wire

• A coil of 40 turns of wire

Which of the following principles explains how an electric motor works?

• Magnetic force

• Magnetism

• Electrolysis

• Electromagnetism

What are the three basic parts of an electric motor?

• commutator, stator, and rotor

• armature, brushes, and battery

• commutator, armature, and brushes

• battery, armature, and DC power supply