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Electrical Machines

Electrical Machines
Eddy current loss will depends on

 Frequency
All of these
 Thickness
 Flux density

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Electrical Machines
For larger units high torque it is preferred to use

 Slip induction motor.
 Partial motor.
 DC shunt motor.
 Universal motor.

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Electrical Machines
Ward Leonard control provides speed control

 above rated speed.
 in one direction only.
 in both direction.
 below rated speed.

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Electrical Machines
Lamination of transformer core is made of

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

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Electrical Machines
Exciting current of an induction motor is

  equal as power transformer.
  none of these.
  higher than power transformer.
  lesser than power transformer.

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Electrical Machines
An inverted V-curve of synchronous motor shows the variation of

 power factor and supply voltage during hunting
 power factor and dc excitation at constant load
All of these
 supply voltage and field current at constant excitation

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MORE MCQ ON Electrical Machines

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