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Electrical Machines

Electrical Machines
In a transformer maximum flux density is not constant, the eddy current loss varies as

 V
 V²
 f
 f²

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Electrical Machines
DC shunt motors are suitable for

  All of this.
 Lathes.
 Centrifugal pumps
 Blowers and fans.

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Electrical Machines
Wave winding is prefered for which of the following rating?

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

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Electrical Machines
Secondary winding of an auto transformer is also called

 tertiary winding.
  common winding.
 compensating winding.
 damping winding.

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Electrical Machines
In salient pole synchronous machine, if direct axis reactance and quadrature axis reactance is equal, then power developed due to reluctance is

 any of the above
 infinite value
 maximum
 zero

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Electrical Machines
Which of the following DC motors has almost constant speed over their full load range?

 none of these.
 Series.
  Shunt.
 Compound (cummolative).

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MORE MCQ ON Electrical Machines

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