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Electrical Machines

Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 6
 4
 1
 2

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Electrical Machines
Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator?

 212 V.
  201.02 V.
 210 V.
 205 V.

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

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

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Electrical Machines
A synchorous generator connected to an infinite bus is over excited. Considering only the reactive power from the point view of the system the machine acts as

  None of these.
 an inductor.
 A capacitor.
 A resistor.

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Electrical Machines
Which of the following DC generators has rising V-I characteristics?

  Compound.
  None of them.
  Shunt.
  Series.

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Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

  asynchronous motor.
  synchronous generator.
  synchronous motor.
  asynchronous generator.

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