Motors review

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

• Magnetic force

• Magnetism

• Electrolysis

• Electromagnetism

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.

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

• electric charge

• electric motor

• electric current

• electric plasma

He was credited for his discovery of electromagnetic induction.

• Thomas Edison

• Benjamin Franklin

• Nikola Tesla

• Michael Faraday

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.

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

• electric field

• electric motor

• electric generator

• electric plasma

What are some components that electric motors require for their operation

• a) Rotor, stator, and batteries
• b) Windings, capacitors, and resistors
• c) Rotor, stator, and bearings

Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field?

• Gravity

• Magnetic flux density/size of magnetic field

• Size of the current

• Length of the conductor

Give two ways you can reverse the direction of a basic dc motor?

• Reverse the current

• Keep the current the same

• Reverse the magnetic field

• Keep the magnetic field the same