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Electrical Machines

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

 V
 f
 f²
 V²

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Electrical Machines
Transformer cooling and insulating oil must be of

 low resistivity.
 high viscosity.
  low viscosity.
 low BDV.

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

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

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Electrical Machines
In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called

  skewing.
  crawling.
  slip.
  cogging.

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Electrical Machines
When a synchronous motor is running at synchronous speed, the damper winding produces

 damping torqe.
 no torque.
 eddy current torque.
 both 1 and 2.

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Electrical Machines
Hysteresis loop represents the area of

 hysteresis loss
 total iron losses
 eddy current loss
 copper loss

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MORE MCQ ON Electrical Machines

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