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Electrical Machines

Electrical Machines
Lamination of transformer core is made of

 wrought iron.
  cast iron.
  silicon steel.
 cast steel.

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Electrical Machines
If the excitation of the synchronous generator fails, it acts as a/an

  induction generator.
 synchronous generator.
 synchronous motor.
 induction motor.

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Electrical Machines
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

 shaded, unshaded
 shaded, shaded
 unshaded, shaded
 unshaded, unshaded

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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

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

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Electrical Machines
In double cage induction motor, the outer cage offers

  high resistance and high reactance.
  high resistance and low reactance.
  low resistance and high reactance.
  low resistance and low reactance.

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Electrical Machines
In a DC Shunt Motor if the load current increases then field flux

 decreases.
 increases.
 remains constant.
 decreases

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MORE MCQ ON Electrical Machines

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