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Synchronous Motors

Synchronous Motors
The capacity of a synchronous capacitor is generally in the range of

None of the listed here
VAR
kVAR
MVAR

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Synchronous Motors
The induced e.m.f. in a synchronous motor working on leading power factor will be

more than the supply voltage
equal to the supply voltage
less than the supply voltage
None of these

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Synchronous Motors
In a synchronous motor which loss varies with load ?

Core loss
Copper loss
Windage loss
Bearing friction loss

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Synchronous Motors
A synchronous motor develops maximum power when load angle is

120°
60°
45°
90°

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Synchronous Motors
Hunting in a synchronous motor can not be due to

Variable supply frequency
Windage friction
Variable frequency
Variable load

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Synchronous Motors
A synchronous machine with large air gap has

a higher value of stability limit
a small value of inherent regulation
all of the listed here
a higher synchronizing power which makes the machine less sensitive to load variations

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