Electrical Machines
In a DC machine the armature mmf is

  stationary with respect to field poles.
  stationary with respect to armature.
  rotating with respect to field poles as well as armature.
 rotating with respect to field poles.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a star - delta starting of an IM

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

ANSWER DOWNLOAD EXAMIANS APP