Electrical Machines
If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by

  Kef2Kf2Bm2.
 Kef2Kf2Bm.
 KefKf2Bm2.
 Kef2KfBm2.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The armature mmf of a DC machine has

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

ANSWER DOWNLOAD EXAMIANS APP