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Electrical Machines

Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

 1.644 KW.
  2.73 KW.
 5.46 KW.
 0.9103 KW.

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Electrical Machines
The back emf produced in a dc motor depends on

  P and Z.
  P.
  none of these.
  Z.

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Electrical Machines
Induction motors have the advantage of

  simple in construction.
  less maintenance.
  all of below.
  less cost.

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Electrical Machines
In a DC compound motor the field regulator is provided to

 demagnetize the field partially.
 control the field flux.
 limit the armature current.
 control the armature flux.

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Electrical Machines
Total core loss is also called as -------------?

 Magnetic loss
 Hysteresis loss
 Copper loss
 Eddy current loss

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Electrical Machines
A commutator in dc machine provide ----------------- rectification?

 half wave
 half wave controlled
 full wave
 full wave controlled

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MORE MCQ ON Electrical Machines

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