Synchronous Motors
A synchronous motor is cheaper than 3-phase induction motor for _____

High speed, high output
High speed, low output
None of the listed here
Low speed, high output

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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

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

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Synchronous Motors
Synchronous capacitor is

An over excited synchronous motor running without mechanical load
An over excited synchronous motor driving mechanical load
An ordinary static capacitor bank
None of the listed here

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