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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
In an alternator the voltage generated per phase is proportional to

  flux per pole.
All of these
  frequency of waveform.
  number of turns in coil.

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Electrical Machines
What is/are the advantages of parallel operation of alternators?

 continuity supply is maintained
All of these
 Increase in reliability
 Increase efficiency under light load conditions

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Electrical Machines
In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve

 high efficiency.
 low starting torque.
  quick acceleration.
 reduced size.

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Electrical Machines
The principal of starting of 3 - Φ IM is similar to

  transformer with short-circuited secondary.
  synchronous motor.
  repulsion motor type starting.
  capacitor run IM.

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Electrical Machines
In electric locomotive which of the following motor are used ?

  Synchronous motor.
  DC series motor.
  Separately compound motor.
  Shunt motor.

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MORE MCQ ON Electrical Machines

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