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Electrical Machines

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

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

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Electrical Machines
In an ideal DC generator the regulation is

 low.
 positive.
 high.
 zero.

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Electrical Machines
In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is

 1/√2
 1/3
 1/√5
 2/√5

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Electrical Machines
An induction motor is, in general analogous to

 two winding transformer with secondary short circuited.
 auto transformer.
None of these
 two winding transformer with secondary open circuited.

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Electrical Machines
Which slots are used in the rotor of an induction motor?

  Open slots.
  Semi closed slots.
  Closed slots.
  None of above.

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Electrical Machines
What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A?

 21%
 10%
 11%
 41%

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