Synchronous Motors
The pull out torque of a synchronous motor will ______ as the field excitation is increased.

Remain unchanged
Increase
None of the listed here
Decrease

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

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