ELECTRICAL MACHINES QUIZ

  more than that of second transformer.

 equal to that of second transformer.

 less than that of second transformer.

 none of these.

 Power P

 1/P

 1/P²

 P²

 both shunt and series field winding.

 only series field winding.

 tertiary winding.

 only shunt field winding.

  Ward Leonard control.

  None of above.

  Rheostatic control.

  Any of above method.

 copper loss.

 hysteresis loss.

 eddy current loss.

 both 1 and 2.

 to counteract the reactance voltage and the cross-magnetizi

  both (B) and (C).

  to make commutation spark less.

 to counteract demagnetizing effect of armature mmf in commutating zone.

 Armature flux distorts the main field flux.

 Armature flux weakens the main field flux.

 None of the options.

  Both option B and C.

  DC of slip frequency.

 DC.

 AC of supply frequency.

 A modulated supply frequency AC voltage with slip frequency envelop.

None of these

 DC machines above 10 kW.

  fractional kW DC machines.

 DC machines bellow 5 kW.

 any of the two machines

 none of these

 machine A

 machine B