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Electrical Machines

Electrical Machines
Maximum power developed depends on

 reactance
 both 1and 2
 voltage
 load angle

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Electrical Machines
Flux density under leading pole tips in case of generator will

 increase
 decrease
 either increase or decrease
None of these

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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

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

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Electrical Machines
Which of the following represents the rotating losses of machine?

 Eddy current losses
 All of the them
 Friction and windage losses
 Hysteresis losses

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Electrical Machines
On what factors the speed of dc motor depends?

 Armature current Ia.
 All of these.
 Field flux.
 Applied voltage.

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Electrical Machines
The starting resistance of DC motor is generally

 around 500 ohms.
 1000 ohms.
 Infinitely large.
  Low.

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MORE MCQ ON Electrical Machines

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