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

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

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Electrical Machines
Two dc machines A and B, using the same conductor material, have armature circuit resistances of 0.4 Ω and 1.2 Ω respectively. Of the two machines,

 B is bigger than A for the same current rating
 both are of the same size for the same current rating
 A is bigger than B for the same current rating
 A is bigger than B for the same voltage rating

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