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Electrical Machines

Electrical Machines
The output power of a dc motor is given by

  none of these.
  EbIa.
  EbIa2.
  EIa.

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Electrical Machines
The effect of ------------------ on main field flux is armature reaction?

 armature current
 armature flux
All of these
 armature mmf

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Electrical Machines
If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will

  get damaged.
  run in a direction opposite to previous one.
  not run.
  continue running in the same direction as before.

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Electrical Machines
In most condition which frame of motor will be preferred?

 Open type.
  Totally enclosed fan coiled.
 Drip proof.
 Splash proof.

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Electrical Machines
A DC generator without commutator is a

 DC motor
 DC generator
 induction motor
 AC generator

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Electrical Machines
The torque developed in IM is nearly proportional to

  1 / V.
  V.
 1 / V2.
  V2.

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MORE MCQ ON Electrical Machines

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