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Electrical Machines

Electrical Machines
The output power of a dc motor is given by

  EbIa.
  EbIa2.
  none of these.
  EIa.

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Electrical Machines
In DC machine torque is proportional to which of the following?

None of these
 flux(φ)
 armature current(Ia)
 both A and B

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Electrical Machines
Which of the following voltage regulation method is accurate ?

 Synchronous impedance method
 ZPF method
 MMf method
 American standard association method

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Electrical Machines
In a DC generator the actual flux distribution depends upon

  shape of the pole shoe.
  all of above.
  clearance between tips of the adjacent pole shoes.
 size of air gap.

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Electrical Machines
In a transformer zero voltage regulation is achieved at a load power factor which is

 zero
 unity
 lagging
 leading

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Electrical Machines
Maximum efficiency will occur, when copper loss is_______to iron loss?

 less than
 greater than
 any of the above
 equal to

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MORE MCQ ON Electrical Machines

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