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ELECTRICAL MACHINES

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

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

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Electrical Machines
Hunting in a synchronous cannot be due to

  variable load.
  windage friction.
  variable supply voltage.
  variable frequency.

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Electrical Machines
The torque angle, in a synchronous motor, is the angle between

  the rotating stator flux and rotor flux.
  magnetizing electric current and back emf.
None of these
  the supply voltage and the back emf.

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Electrical Machines
A synchronous motor will deliver maximum power when

  input power factor is unity.
  load angle is 45°.
  load angle is 0°.
  load angle is equal to internal angle θ.

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Electrical Machines
In a synchronous motor hunting can be reduced to minimum possible by

  using a flywheel.
  any of above methods.
  designing the motor for adequate synchronizing power.
  providing damper winding in the rotor pole faces.

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