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Electrical Machines

Electrical Machines
What is the phase difference between two windings of A.C servomotor ?

 30°.
 60°.
 90°.
 120°.

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Electrical Machines
What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?

  0.905.
  0.05.
 1.1.
 20.

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Electrical Machines
When maximum flux density is constant, the eddy current losses are proportional to

 V2
 f
 V
 f2

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Electrical Machines
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop

  DC motor torque.
  induction motor torque.
  synchronous motor torque.
  induction generator torque.

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Electrical Machines
For a dc machine shunt resistance and armature resistance values are

 high and high
 high and low
 low and low
 low and high

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Electrical Machines
Wave winding is employed in DC machine of

 high current and low voltage rating.
 low current and low voltage rating.
  low current and high voltage rating.
 high current and low voltage rating.

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MORE MCQ ON Electrical Machines

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