Cogging in an induction motor is caused

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M: +2.00/-0.66

[ESE (IES) EE 2019 Paper 2 (Technical)]

A if the number of stator slots are unequal to number of rotor slots.

B if the number of stator slots are an integral multiple of rotor slots.

C if the motor is running at fraction of its rated speed.

D due to 5th harmonic.