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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

 improve but terminal voltage will fall.
  improve and terminal voltage will rise .
  worsen and terminal voltage will fall
  worsen and terminal voltage will rise.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines