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Electrical Machines

Electrical Machines
If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is

 115 V
 200 V
 230 V
 460 V

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Electrical Machines
In dc machines, the armature windings are placed on the rotor because of the necessity for

 generation of voltage
 development of torque
 commutation
 electromechanical energy conversion

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Electrical Machines
In dc machines, the space distribution of air-gap flux density wave at no load is

 sinusoidal
 co- sinusoidal
 flat-topped
 rectangular

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Electrical Machines
In DC machine, the armature windings are placed on the rotor because of necessity for

 development of torque.
 electromechanical energy conversion.
 commutation.
 generation of voltage.

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Electrical Machines
The stator core of a 3 - Φ induction motor is laminated in order to reduce the

  hysteresis loss.
  both of the above.
  weight of the stator.
  eddy current loss.

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Electrical Machines
A 3 - Φ slip ring motor has

  short-circuited rotor.
  double cage rotor.
  wound rotor.
  any of the above.

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MORE MCQ ON Electrical Machines

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