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Electrical Machines

Electrical Machines
A DC generator beyond critical resistance will generate

 maximum power.
 maximum current.
 maximum voltage.
 no voltage.

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Electrical Machines
A 4 pole DC generator rotates at 1500 rpm. How many times in a second, will the emf induced in each armature conductor changes its direction?

 200.
  100.
 500.
 750.

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Electrical Machines
For P pole machine relation between electrical degrees and mechanical degrees is

 θelec = 2/P*θmech
 θelec = 4/P*θmech
 θelec = θmech
 θelec = P/2*θmech

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Electrical Machines
In DC generator on no-load, the air gap flux distribution in space is

  sinusoidal.
  flat topped.
  pulsating.
 triangular.

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Electrical Machines
Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator?

 same prime mover speed
 same frequency
 same phase sequence
 same voltage magnitude

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Electrical Machines
An unexcited single phase synchronous motor is

  universal motor.
 reluctance motor.
 repulsion motor.
 AC series motor.

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MORE MCQ ON Electrical Machines

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