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Electrical Machines

Electrical Machines
Hunting phenomenon is observed in which motor?

  Synchronous motor.
 Both A and C.
 Induction motor.
 DC motor.

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Electrical Machines
At the instant of starting, the per unit slip of 3 - Φ induction motor is

  0.1.
  1.0.
  0.5.
  0.05.

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Electrical Machines
The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in

  star.
None of these
  delta or star according to need.
  delta.

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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

 75 W
 168.75 W
 112.5 W
 50 W

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Electrical Machines
Equalizer rings are used in which of the followings?

 both 1 and 2
 wave winding
 lap winding
None of these

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Electrical Machines
In DC machine shape of armature MMF wave is?

 Peaky in nature.
 Triangular and directed towards brush axis.
 Saddle shape.
 Triangular and directed towards main pole.

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MORE MCQ ON Electrical Machines

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