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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?

  0.905.
 1.1.
  0.05.
 20.

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Electrical Machines
Scott connections are used for

 three phase to two phase transformation.
 any of the above.
 single phase to three phase transformation.
 three phase to single phase transformation.

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Electrical Machines
Eb/V ratio of a DC motor is an indication of

 Speed regulation.
  Effiency.
 Starting torque.
 Running Torque.

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Electrical Machines
Capacitor in split phase induction motor is used to

 reduce the harmonics.
 start the motor.
 improve the starting torque.
 improve the power factor.

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Electrical Machines
We can apply source transformation to voltage source when a resistance is connected to it in

 15 HP.
  13 HP.
 14 HP.
  10 HP.

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Electrical Machines
In a dc machine 4 pole lap winding is used. The number of parallel paths are?

 8
 2
 4
 1

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