Electrical Machines
The armature of DC machine is made of silicon steel lamination to

 reduce both eddy current and hysteresis loss.
 reduce hysteresis loss only.
 reduce eddy current loss only.
 increase the permeability.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Cogging in induction motor occurs when

 number of stator teeth - number of rotor teeth = 0.
 number of stator teeth - number of rotor teeth = even number.
 number of stator teeth - number of rotor teeth = odd number.
 number of stator teeth - number of rotor teeth = negative number.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In large sized DC machines the compensating windings are provided to

None of these
 reduce eddy current losses by providing local short circuits.
  neutralize voltage induced in coil due to fluctuation of l
 compensate for the decrease in speed due to increase of load.

ANSWER DOWNLOAD EXAMIANS APP