Generators and Motors Quiz

What is the primary function of a generator?

• Convert electrical energy into mechanical energy

• Convert mechanical energy into electrical energy

• Store mechanical energy

• Store electrical energy

Which component in a generator is responsible for creating the magnetic field?

• Brushes

• Commutator

• Stator

• Rotor

What is the role of the commutator in a DC generator?

• To rotate the rotor

• To create a magnetic field

• To cool the generator

• To reverse the direction of the electric current

What does a motor convert electrical energy into?

• Mechanical energy

• Sound energy

• Light energy

• Heat energy

In a DC motor, what is the function of the brushes?

• To cool the motor

• To reverse the direction of the current

• To create a magnetic field

• To establish electrical connection with the commutator

How is the direction of current changed in an AC motor?

• By using a commutator

• By changing the polarity of the AC supply

• By rotating the rotor

• By using brushes

What is a key difference between a generator and a motor?

• Motors store electrical energy

• Generators convert electrical energy into mechanical energy

• Generators convert mechanical energy into electrical energy

• Motors convert mechanical energy into electrical energy

How can the speed of a motor be controlled?

• By changing the magnetic field strength

• By adjusting the commutator

• By varying the electrical current supplied to the rotor

• By varying the mechanical source speed

Can a motor be used as a generator?

• No, it is not possible

• Yes, with the use of charge controllers and protection systems

• Only in specific conditions

• Only with DC motors

In electric vehicles, how is the motor used during braking?

• It reverses the direction of rotation

• It works as a generator to charge the batteries

• It stops working

• It increases the speed of the vehicle