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Electrical Machines

Electrical Machines
The emf induced in a conductor rotating in a bipolar field is

 both of above.
 DC.
 AC.
None of these

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Electrical Machines
Essential conditions for two DC generators are connecting for parallel operation is/are

 polarities should be same.
 both A and B.
 rating of generators should be same.
 terminal voltage should be same.

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Electrical Machines
Which of the following methods of speed control is not affected through stator side?

  Change of supply frequency.
  Change of number of pole.
  Change of supply voltage.
  Change of rotor resistance.

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Electrical Machines
Two transformers operating in parallel will share the load depending on their

 ratings
 efficiency
 per unit impedance
 leakage reactance

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Electrical Machines
If the mechanical angle α between the stator and rotor poles increases, then the stator current

 None of above.
  Increases.
 Remains unchanged.
 Decreases.

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Electrical Machines
The shaft of induction motor should be

  flexible.
  any of these.
  hollow.
  stiff.

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MORE MCQ ON Electrical Machines

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