Synchronous Motors
While running, a synchronous motor is compelled to run at synchronous speed because of _______

Damper winding in its pole faces
Compulsion due to lenz's law
Induced emf in rotor field winding by stator flux
Magnetic locking between stator and rotor poles

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
All of the listed here
eddy current and hysteresis torque in pole faces

ANSWER DOWNLOAD EXAMIANS APP