Electrical Machines
The armature mmf of a DC machine has

  trapezoidal space distribution and is stationary in space.
  triangular space distribution and is stationary in space.
 stepped distribution and rotates at the speed of armature.
  triangular space distribution and rotates at the speed of armature.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC machine the armature mmf is

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

ANSWER DOWNLOAD EXAMIANS APP