Electrical Machines
The damper windings also called the squirrel cage windings or damper grids

  both (A) and (B).
  are provided in a synchronous motor to make it self starting.
  are provided on the stator for improving power factor.
  consists of short-circuited copper bars embedded in the field pole faces.

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Electrical Machines
In a 3 - Φ induction motor

  power factor at starting is low as compared to that while running.
  power factor at starting is high as compared to that while running.
  none of them.
  power factor at starting in the same as that while running.

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