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Electrical Machines

Electrical Machines
Universal motor have which of the following application?

  Domestic pump.
  Traction.
  Food mixer.
  Lift.

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Electrical Machines
Compensating winding are used to rectify the flux density waveform at

None of these
 throughout the air gap.
 interpole region.
  region under main pole.

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Electrical Machines
The brushes of a DC machine should be placed on the

 commutator in the polar axis.
 armature midway between poles.
 commutator in the inter polar axis.
 armature in the polar axis.

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Electrical Machines
Hysteresis loop represents the area of

 total iron losses
 eddy current loss
 copper loss
 hysteresis loss

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Electrical Machines
Thin laminations are used in a machine in order to reduce

 Copper losses
 Eddy current losses
 Hysteresis losses
 Both 1 and 2

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Electrical Machines
A short circuit test on a transformer gives

 copper loss at full load.
 copper loss at half load.
  copper loss at any load.
 copper loss at over load.

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