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Electrical Machines

Electrical Machines
Pole changing methods are suitable only for ___________ type induction motor.

  linear.
  cage.
  none of these.
  wound.

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Electrical Machines
Maximum power will be developed when back emf is

 half of the supply voltage.
All of these
 double the supply voltage.
 equal to supply voltage.

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Electrical Machines
In a dc machine, the demagnetizing effect of armature reaction is due to

 non-sinusoidal nature of armature mmf
 component of armature mmf along field axis
 magnetic saturation in half of the field pole
 uneven air-gap length

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Electrical Machines
Reluctance and hysteresis motors are the types of which electrical motor?

 Stepper motor.
  1 - Φ synchronous motor.
 3 - Φ induction motor.
 DC motor.

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Electrical Machines
Which of following DC generator will be in a position to build up without any residual magnetism in the field?

  Separately excited.
  Series.
 Shunt.
  Compound.

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Electrical Machines
If the mechanical angle α between the stator and rotor poles increases, then the stator current

 Decreases.
 Remains unchanged.
  Increases.
 None of above.

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MORE MCQ ON Electrical Machines

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