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Electrical Machines

Electrical Machines
Compensating winding is placed in the

 armature core
All of these
 main field
 pole shoe

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Electrical Machines
A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be

 50 W
 112.5 W
 168.75 W
 75 W

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Electrical Machines
In applied voltage is reduced in a dc shunt motor

 None of these.
  Full load current.
 Full load torque.
 Full load speed.

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Electrical Machines
Pole changing methods are suitable only for ___________ type induction motor.

  cage.
  linear.
  wound.
  none of these.

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Electrical Machines
Which of the following statements is/are correct ?

None of these
 Inter pole winding will act in interpolar region.
 Compensating winding will act under the pole.
 Both A and B.

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Electrical Machines
In which of the following DC Motor the ratio of starting torque to full load torque is minimum?

  Series motor.
  Differential compound motor.
  Shunt motor.
  Cumulative compound motor.

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