Electrical Machines
In a 3 - φ induction motor running at full load which of these parameters is stationary with respect to the stator mmf wave?

  Stator winding.
  Both rotor and stator winding.
  Rotor mmf wave.
  Rotor winding.

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

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

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