a 3 phase slip ring induction motor is wound for 4 poles on
stator and 6 poles on rotor; when 3 phase balanced voltage
source at 50 hz is applied to motor it will run at
a)1500rpm b)1000rpm c)750 rpm d)zero rpm

Answer Posted / mohit

If stator poles and rotor poles are not equal then resultant
torque will be zero and motor will not run.

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