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Electrical Machines

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

 f²
 V
 f
 V²

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Electrical Machines
The current drawn by a DC motor at the time of starting is

 Normal.
 Very low.
 Zero.
 Very high.

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Electrical Machines
The armature core of a DC machine is laminated to minimise

 temperature rise
 eddy-current loss
 hysteresis loss
 mechanical loss

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Electrical Machines
In DC generator, lap winding is used in

  high current and low voltage applications.
 where greater load is connected.
 where constant speed is required.
 high voltage and low current applications.

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Electrical Machines
Which motor used in Lathe machine?

None of these
  D.C. cumulative compound motor.
  D.C. shunt motor.
  D.C . series motor.

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Electrical Machines
Iron loss in a transformer mainly occurs in

 winding of transformer.
 iron made tank of transformer.
 steel core in transformer.
 transformer insulating oil.

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MORE MCQ ON Electrical Machines

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