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Electrical Machines

Electrical Machines
The power flow of a dc motor, with respect to a DC generator is

  increased.
  reversed.
  none of these.
  modified.

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Electrical Machines
Which of the following statements is/are correct ?

 Both A and B.
None of these
 Inter pole winding will act in interpolar region.
 Compensating winding will act under the pole.

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

 460 V
 200 V
 115 V
 230 V

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Electrical Machines
The armature MMF waveform of a DC machine is

  triangular.
  pulsating.
  rectangular.
  sinusoidal.

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Electrical Machines
The wattage rating of a ceiling fan motor will be

  50 - 150 W.
 200 - 250 W.
 10 - 20 W.
 250 - 500 W.

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Electrical Machines
What is the function of inter pole in DC generator?

 To serve the economical aspects.
 To get a superior commutation.
 To neutralize the distortion of main field flux due to armature reaction.
  Both option B and C.

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