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Synchronous Motors

Synchronous Motors
A synchronous motor can be started by

Provinding damper winding
All of the listed here
Dc compound motor
Pony motor

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Synchronous Motors
An under excited synchronous motor behaves as_______

A capacitor
None of the listed here
A resistor
An inductor

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Synchronous Motors
The operating speed of a synchronous motor can be changed to new fixed value by

using brakes
changing frequency
changing the supply voltage
changing the load

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Synchronous Motors
The armature current of the synchronous motor has higher values for

Both higher and low excitation
Higher excitation only
None of the listed here
Low excitation only

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Synchronous Motors
Mostly, synchronous motors are of

Alternator type machines
Smooth cylindrical type machines
Salient pole type machines
Induction type machines

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Synchronous Motors
The size of a synchronous motor decreases with the increase in

Horse power rating
Flux density
All of the listed here
Speed

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