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Electrical Machines

Electrical Machines
A generator may loose residual magnetism due to

  over excitation.
  vibrations.
  any of these.
  heating.

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Electrical Machines
The direction of rotation of conductor of a DC motor can be determined by

 Fleming's left hand rule.
 Lenz's law.
 Fleming's right hand rule.
 Ampere law.

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Electrical Machines
The breakdown torque of a synchronous motor varies as

 applied voltage V
 1/V
 V²
 1/V²

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Electrical Machines
If the excitation of the synchronous generator fails, it acts as a/an

 induction motor.
  induction generator.
 synchronous generator.
 synchronous motor.

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Electrical Machines
An inverted V-curve of synchronous motor shows the variation of

All of these
 power factor and supply voltage during hunting
 supply voltage and field current at constant excitation
 power factor and dc excitation at constant load

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Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

 none of these.
  salient.
 non uniform cylindrical.
 cylindrical.

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MORE MCQ ON Electrical Machines

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