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Questions and Answers
What is the purpose of the commutator in a DC electric motor?
What is the purpose of the commutator in a DC electric motor?
- To increase the speed of the motor
- To reverse the direction of the current in the armature coil (correct)
- To control the torque of the motor
- To convert AC to DC
What is the role of the stator in an electric motor?
What is the role of the stator in an electric motor?
- To regulate the speed of the rotor
- To conduct electrical current to the rotor
- To provide a magnetic field for the rotor to interact with (correct)
- To support and protect the rotor
What happens to the back emf (electromotive force) as the speed of a DC motor increases?
What happens to the back emf (electromotive force) as the speed of a DC motor increases?
- It decreases
- It becomes zero
- It remains constant
- It increases (correct)
In an AC induction motor, what is the function of the rotor bars?
In an AC induction motor, what is the function of the rotor bars?
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