Generators Motors and Electricity

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

• Magnetic force

• Magnetism

• Electrolysis

• Electromagnetism

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Which is NOT a distinguishing feature of an electric generator?

• An electric generator converts mechanical energy into electrical.

• An electric generator converts electrical energy into mechanical energy.

• It generates electricity

• It is based on the principle of electromagnetic induction.

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What do we call a device that converts electricity into mechanical movement?

• electric charge

• electric motor

• electric current

• electric plasma

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What do you call a device that converts mechanical movement into electricity?

• electric field

• electric motor

• electric generator

• electric plasma

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What two forces are required for generators and electric motors to work?

• magnetic and thermal

• magnetic and radiant

• electric and thermal

• electric and magnetic

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What would happen to the coiled wire in an electric motor model if there are repulsion and attraction of the magnetic poles?

• The coil fluctuates and converts electrical energy into chemical energy.

• The coil stops and changes mechanical energy into electrical energy.

• The coil rotates and changes electrical energy into mechanical energy.

• The coil remains unstable.

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What do you call a device that produces an electric current when a coil of wire is wrapped around an iron core and rotated near a magnet?

• magnet

• car

• generator

• motor

He was credited for his discovery of electromagnetic induction.

• Thomas Edison

• Benjamin Franklin

• Nikola Tesla

• Michael Faraday

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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

Which of the following is the CORRECT description of the operation of an electric motor?

• The electric motor uses electricity.

• The operation is based on the principle of electromagnetism.

• The motor converts electric energy into mechanical energy.

• All of the above.

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