While starting a synchronous motor by induction motor action, field winding is usually_____________?

Related Mcqs:

The rotor copper losses, in a synchronous motor, are met by____________?

A. d.c. source B. armature input C. motor input D. supply lines...

The maximum value of torque that a synchronous motor can develop without losing its synchronism, is known as_____________?

A. slip torque B. pull-out torque C. breaking torque D. synchronising torque...

In which of the following motors the stator and rotor magnetic field rotate at the same speed?

A. Universal motor B. Synchronous motor C. Induction motor D. Reluctance motor...

The minimum armature current of the synchronous motor corresponds to operation at______________?

A. zero power factor leading B. unity power factor C. 0.707 power factor lagging D. 0.707 power factor leading...

Power factor of a synchronous motor is unity when_____________?

A. the armature current is maximum B. the armature current is minimum C. the armature current is zero D. none of the above...