Electrician Red Seal · Question
What is the purpose of slip in an AC induction motor?
Slip is the difference in speed between the rotating magnetic field of the stator and the actual rotational speed of the rotor. This difference is essential for
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Question: What is the purpose of slip in an AC induction motor?
Answer options: ✅ To allow the rotor's magnetic field to lag the stator's magnetic field, inducing current and producing torque.
- To reduce the starting current drawn by the motor.
- To provide precise speed control for the motor.
- To dissipate excess heat generated by the windings.
Correct answer: To allow the rotor's magnetic field to lag the stator's magnetic field, inducing current and producing torque.
Explanation: Slip is the difference in speed between the rotating magnetic field of the stator and the actual rotational speed of the rotor. This difference is essential for the induction motor to operate, as it allows the stator's magnetic field lines to 'cut' the rotor conductors, inducing electromotive force (EMF) and current in the rotor, which then produces torque. Without slip, there would be no induced current and thus no torque. Slip does not reduce starting current, nor does it inherently provide precise speed control or dissipate heat.
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