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Electrical Machines

Electrical Machines
In a synchronous motor, damper windings are provided on

  stator frame.
None of these
  pole faces.
  rotor shaft.

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Electrical Machines
A 3 - Φ, 12 pole, 600 V, 50 Hz star connected IM has rotor resistance and stand still resistance of 0.03 Ω and 0.5 Ω respectively. The speed of maximum torque will be

  240 rpm.
 450 rpm.
 540 rpm.
  470 rpm.

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Electrical Machines
For the speed control of polyphase squirrel cage induction motor, if frequency of operation is decreased with

 either of these
 constant supply voltage V, starting torque Tst decreases
 constant V, Tst increases
None of these

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

 decrease
None of these
 either increase or decrease
 increase

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Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.

 positive.
  zero.
 low.
 negative.

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Electrical Machines
Induction motors provided with open slots have

  leading power factor.
  higher efficiency.
  less breakdown torque.
  more breakdown torque.

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MORE MCQ ON Electrical Machines

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