Electrical Machines
In large sized DC machines the compensating windings are provided to

 reduce eddy current losses by providing local short circuits.
None of these
 compensate for the decrease in speed due to increase of load.
  neutralize voltage induced in coil due to fluctuation of l

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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,

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

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