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Electrical Machines

Electrical Machines
Flux density under leading pole tips in case of generator will

 increase
None of these
 either increase or decrease
 decrease

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Electrical Machines
Ward Leonard control is provides speed control

  In both direction.
  In one direction only.
  Above rated speed.
  Below rated speed.

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Electrical Machines
In double cage induction motor, the outer cage offers

  high resistance and low reactance.
  high resistance and high reactance.
  low resistance and low reactance.
  low resistance and high reactance.

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Electrical Machines
Which of the following voltage regulator is preferred for providing large values of load current?

  Transistor series regulator.
None of these
  Transistor shunt regulator.
  Zener diode shunt regulator.

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Electrical Machines
The sparking at the the brushes, in a DC machines is due to

 presence of commutator.
 armature reaction.
  reactance voltage.
 high resistance of carbon brushes.

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Electrical Machines
The noise resulting from vibrations of lamination set by magnetic forces, is termed as

  hum.
 zoom.
 magnetostriction.
 boo.

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MORE MCQ ON Electrical Machines

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