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Electrical Machines

Electrical Machines
Reactive power generated or delivered significantly depends on

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

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Electrical Machines
If the mechanical angle α between the stator and rotor poles increases, then the stator current

 Remains unchanged.
  Increases.
 None of above.
 Decreases.

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Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. The highest speed of the alternators is

  600 rpm.
  500 rpm.
  3600 rpm.
  3000 rpm.

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Electrical Machines
In applied voltage is reduced in a dc shunt motor

 Full load torque.
  Full load current.
 None of these.
 Full load speed.

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Electrical Machines
Maximum power developed by a synchronous motor depends on

 supply voltage, load angle and excitation
 excitation and load angle
 supply voltage and load angle
 supply voltage and excitation

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Electrical Machines
Series booster is a

 shunt wound DC generator.
 separately excited DC generator.
  series wound DC generator.
 permanent magnet DC generator.

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MORE MCQ ON Electrical Machines

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