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Electrical Machines

Electrical Machines
A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is

 25 Hz
 100 Hz
 50 Hz
 0 Hz

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Electrical Machines
For same HP rating and full load speed which of following motor has poor starting torque?

 Differently compounded.
 Series.
 Cummulative compound.
 Shunt.

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Electrical Machines
Inter pole winding is connected in-------------------------- ?

 parallel with armature
 parallel with main poles
 series with main poles
 series with armature

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Electrical Machines
Which of the following motor used in hair dryers?

  Cage induction motor.
  Split phase IM.
  Synchronous motors.
  Shaded pole IM.

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Electrical Machines
Synchronous condensers are used to

 improve the power factor
 reduce hunting
All of these
 improve starting torque

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Electrical Machines
What will be the eddy current loss if the supply frequency of a transformer becomes double?

 Four times.
 Doubled.
 Eight times.
 Remains same.

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MORE MCQ ON Electrical Machines

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