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Electrical Machines

Electrical Machines
The output voltage of a DC generator is

 E = V + Ra.
 E = V – IaRa.
 E = V + Ia.
  E = V + IaRa.

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Electrical Machines
In which of the following DC Motor the ratio of starting torque to full load torque is minimum?

  Series motor.
  Shunt motor.
  Cumulative compound motor.
  Differential compound motor.

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Electrical Machines
In DC shunt motor if load is increased, the speed

 increase proportional.
 remains constant.
 increased slightly.
 reduce slightly.

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Electrical Machines
In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the

  starting resistance in the starter.
  rotor at slip rings.
None of these
  stator phases of the motor.

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Electrical Machines
Which type motors are preferred for lathes?

 Either A or B.
 Synchronous motor.
 Squirrel Cage induction motor.
 DC shunt motors.

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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?

  Series.
  Separately excited.
  Compound.
 Shunt.

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MORE MCQ ON Electrical Machines

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