Electrical Machines
The mmf produced by rotor currents of a 3 - Φ induction motor

  is at standstill with respect to stator mmf.
  rotates at synchronous speed with respect to rotor.
  rotates at the speed of rotor in the air gap.
  rotates at slip speed with respect to stator mmf.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The coil spam

 can never be equal to pole pitch.
  may or may not be exactly equal to people pitch.
 must be exactly equal to people pitch.
 none of above.

ANSWER DOWNLOAD EXAMIANS APP