Electrical Machines
A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ω. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is

 0.87
 0.95
 1.06
 0.96

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a star - delta starting of an IM

  resistance is inserted in the rotor.
  applied voltage per stator phase is 57.7 % of a line volt
  line voltage is 57.7 % of stator voltage.
  reduced voltage is applied to the stator.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines