Electrical Machines
In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________.

 increased.
  remains unchanged.
 kept constant to certain value.
 decreased.

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Electrical Machines
The armature mmf of a DC machine has

  triangular space distribution and rotates at the speed of armature.
 stepped distribution and rotates at the speed of armature.
  trapezoidal space distribution and is stationary in space.
  triangular space distribution and is stationary in space.

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