Electrical Machines
A short circuit test on a transformer gives

 copper loss at over load.
 copper loss at half load.
  copper loss at any load.
 copper loss at full load.

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

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

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