Electric Motor Basics Quiz

What is the purpose of a switch in an electric circuit?

• To stop the flow of electricity

• To complete the circuit path

• To decrease the resistance

• To increase the voltage

What happens when a permanent magnet is brought near another magnet with opposite poles?

• They attract each other

• They cancel each other out

• They create a new pole

• They repel each other

What is an electromagnet and how is it different from a permanent magnet?

• It is made of different materials than a permanent magnet

• It is weaker than a permanent magnet

• It can only attract, while a permanent magnet can attract and repel

• It can be turned on or off, while a permanent magnet is always on

What happens to the polarity of an electromagnet when the direction of the electric current is reversed?

• The polarity switches

• The electromagnet becomes weaker

• The electromagnet turns off

• The polarity remains the same

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

• To increase the speed of the motor

• To reverse the direction of the motor

• To maintain continuous contact with the brushes

• To switch the polarity of the electromagnet every half turn

What is the part of the motor that does not move called?

• Rotor

• Axle

• Stator

• Commutator

What is the spinning force on the armature in an electric motor called?

• Resistance

• Torque

• Current

• Voltage

How can the torque of an electric motor be increased?

• By using weaker electromagnets

• By reducing the number of loops in the armature

• By using a greater current

• By using fewer wires in the armature

What type of motor is commonly found in devices powered by batteries?

• Hybrid motor

• AC motor

• Magnetic motor

• DC motor

What can the spinning motion of an electric motor be converted into?

• Heat energy

• Light energy

• Sound energy

• Different types of movement