Q.

In an induction motor, when the number of stator slots is equal to an integral number of rotor slots  

A. there may be a discontinuity in torque slip characteristics
B. a high starting torque will be available
C. the maximum torque will be high
D. the machine may fail to start
Answer» D. the machine may fail to start
Explanation: when the number of stator slots is an integral multiple of a number of rotor slots the machine fails to start and this phenomenon is called cogging.
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