Synchronous Motors
The net armature voltage of a synchronous motor is equal to the

vector difference of Eh and V
arithmetic difference of Eb and V
arithmetic sum of Eb and V
vector sum of Eb and V

ANSWER DOWNLOAD EXAMIANS APP

Synchronous Motors
While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by

induction motor torque in field winding
induction motor torque in damper winding
eddy current and hysteresis torque in pole faces
All of the listed here

ANSWER DOWNLOAD EXAMIANS APP