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Electrical Machines

Electrical Machines
When flux density is constant in a transformer, hysteresis loss varies as

 V
 V²
 f²
 f

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Electrical Machines
If a DC motor is connected across the AC supply it will

 Run at normal speed.
  Burn.
 Run at lower speed.
 Not run.

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Electrical Machines
Which of the following is not a part of transformer?

 Conservator tank.
 Radiator.
 Tap changer.
  Commutator.

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Electrical Machines
If the air gap of IM is increased, ____________ will increase.

  magnetizing current.
  air gap flux.
  power factor.
  speed.

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Electrical Machines
The voltage regulation of a DC generator at full load being zero implies that the generator is

 shunt connected.
  series connected.
  cumulatively compounded.
  deferentially compounded.

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Electrical Machines
The output power of any electrical motor is taken from the

 Field.
 Armature.
 Coupling mounted on the shaft.
 Motor frame.

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MORE MCQ ON Electrical Machines

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