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Electrical Machines

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

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

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

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

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

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

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

 Shaded pole type.
 Capacitor start.
 Split phase type.
  Capacitor run type.

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Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

 AC single phase motor.
 Synchronous motor.
 Induction motor.
 DC Shunt Motor

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Electrical Machines
In DC generator, which component plays the vital role to produce the direct current?

 Yoke.
  Commutator.
 Armature.
 Brush.

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MORE MCQ ON Electrical Machines

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