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Electrical Machines

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

 20.
 1.1.
  0.905.
  0.05.

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Electrical Machines
A single-winding single-phase motor has

  zero starting torque.
 low starting torque.
 high starting torque.
 starting torque equal to full-load torque.

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Electrical Machines
Eddy current loss will depends on

All of these
 Flux density
 Frequency
 Thickness

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

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

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Electrical Machines
The efficiency of a transformer is mainly dependent on

 copper losses.
 stray losses.
 core losses.
 dielectric losses.

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Electrical Machines
Field weakening method is also called as-----------?

 constant current control
 constant torque control
 constant power control
 constant voltage control

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MORE MCQ ON Electrical Machines

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