Electrical Machines
To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by

 increasing field excitation.
 fixing the brush axis inline with the pole axis.
  compensating winding and commutating poles.
 shifting the brush axis from GNA to MNA.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following statements is/are correct statements?

All of these
 EMF per turn in HV winding is more than EMF per turn in LV winding
 EMF per turn in both the windings are equal
 EMF per turn in HV winding is less than EMF per turn in LV winding

ANSWER DOWNLOAD EXAMIANS APP