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Electrical Machines

Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 cos2δ
 sin2δ
 sinδ
 cosδ

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Electrical Machines
The slip of an induction motor normally does not depend on

  synchronous speed.
  shaft torque.
  rotor speed.
  core loss component.

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Electrical Machines
Transformer action requires a

 constant magnetic flux.
 increasing magnetic flux.
 alternating magnetic lux.
 alternating electric flux.

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Electrical Machines
In DC machine yoke offers

 produce working flux
 mechanical protection to the machine
 both A and B
 flux path completion

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Electrical Machines
The interpoles in dc machines have a tapering shape in order to

 reduce the overall weight
 economise on the material required for interpoles and their windings
 reduce the saturation in the interpole
 increase the acceleration of commutation

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Electrical Machines
For high current and low current rating which winding is employed to DC machine?

 None of above
 Lap winding
 Both lap and wave winding
 Wave winding

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MORE MCQ ON Electrical Machines

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