Understanding Electric Motors

What completes an electrical circuit allowing the light bulb to light up?

• A switch

• A battery

• A magnet

• A motor

What type of magnet can be turned on and off?

• Horseshoe magnet

• Permanent magnet

• Electromagnet

• Bar magnet

What happens when the polarity of an electromagnet is reversed?

• North and south poles switch places

• It attracts more metal

• It becomes a permanent magnet

• It stops working

What is the purpose of a commutator in an electric motor?

• To automatically switch the current direction

• To increase the speed of the motor

• To reduce electricity usage

• To keep the motor cool

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What is the role of brushes in an electric motor?

• To increase magnetic attraction

• To maintain electrical contact within the motor

• To clean the motor

• To decrease friction

How can the torque of an electric motor be increased?

• By using a smaller commutator

• By decreasing the electricity

• By using more wires

• By using fewer wires

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What is the non-moving part of an electric motor called?

• Commutator

• Stator

• Rotor

• Armature

What is the spinning part of an electric motor known as?

• Axle

• Rotor

• Stator

• Brush