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Synchronous Motors

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

kVAR
None of the listed here
VAR
MVAR

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Synchronous Motors
The power factor correction capability of a loaded synchronous motor _____ with the increases in mechanical load.

Increases
None of the listed here
Decreases
Remains unchanged

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Synchronous Motors
Dust and dirt accumulation on motor winding will result in

Rise in winding temperature
Increased core losses
Shorting of coils
Eddy current flow

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Synchronous Motors
In a synchronous motor, the magnitude of stator back emf depends on _____

Both the speed and rotor flux
Dc excitation only
Load on the motor
Speed of the rotor

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Synchronous Motors
In a synchronous motor, the rotor copper loss are met by ______

Supply lines
Dc source
Armature input
Motor input

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Synchronous Motors
The net armature voltage of a synchronous motor is equal to the

arithmetic difference of Eb and V
arithmetic sum of Eb and V
vector sum of Eb and V
vector difference of Eh and V

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