Electrical Machines
Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then

 The magnetude of current will increase, but power factor will decrease.
 The magnitude of current will decrease but the power factor will increase.
 The magnitude will both increase.
 The magnitude of circuit as well as the power factor will decrease.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Compensating windings are used in DC generators

  to provide path for the circulation of cooling air.
  mainly to reduce the eddy currents by providing local short circuit.
  to neutralize the cross magnetizing effect of the armature reaction.
None of these

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines