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Electrical Machines

Electrical Machines
Reactive power generated or delivered significantly depends on

 excitation.
 both 1 and 2.
 frequency.
 load angle.

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Electrical Machines
A DC generator can be considered as

 power pump.
 rectifier.
 prime mover.
 rotating amplifier.

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Electrical Machines
In DC machines shape of net flux density is?

 flat tapped or trapezoidal
 saddle shape
 sine wave
 peaky in nature

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Electrical Machines
In above question, find rms line voltage for delta connection?

 399 V.
  230.2 V.
 100 V.
 50 V.

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Electrical Machines
In single phase rotary converter the number of slip rings will be

 three.
 two.
 six.
 four.

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Electrical Machines
Under commutation results in

  sparking at the middle of the brush.
  sparking at the leading edge of the brush.
  sparking the trailing edge of the brush.
  no sparking.

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MORE MCQ ON Electrical Machines

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