Electrical Machines
Which of the following is/are effects of armature reaction?

 increases the design cost
 increase the iron loss
 increase the maintenance and repair
All of these

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

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

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