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Electrical Machines

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

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

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Electrical Machines
In which of the following, voltage regulation may be zero or negative

 unity power factor
 leading power factor
 lagging power factor
All of these

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Electrical Machines
What type of dielectric material is used in capacitors used for fans and for power factor correction?

  Glass.
  Oil impregnated paper.
  Vacuum.
  Mica.

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Electrical Machines
In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then

 E ∝ φ/f
 E ∝ φf
 E ∝ 1/(φf)
 E ∝ f/φ

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Electrical Machines
In DC generator, which component plays the vital role to produce the direct current?

 Yoke.
  Commutator.
 Brush.
 Armature.

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Electrical Machines
A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of

 3000W
 1000W
 100W
 500W

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MORE MCQ ON Electrical Machines

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