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Electrical Machines

Electrical Machines
Eddy current loss will depends on

 Frequency
All of these
 Flux density
 Thickness

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Electrical Machines
In travelling cranes for swing action which motor is preferred?

  Capacitor type induction motors.
  DC series motor.
  AC slip ring IM.
  Reluctance motor.

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Electrical Machines
Flux density under trailing pole tips in case of generator will

 increase
 decrease
 either increase or decrease
None of these

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Electrical Machines
Lap winding is prefered for which type of machines?

 high current and high voltage
 low current and low voltage
 high current and low voltage
 low current and high voltage

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Electrical Machines
The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________.

 4.
  8.
 6.
  2.

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Electrical Machines
For high current and low voltage rating which winding is employed to DC machine?

 No wave and lap winding.
 Both wave and lap winding.
 Wave winding.
 Lap winding.

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