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Synchronous Motors

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

MVAR
kVAR
None of the listed here
VAR

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

changing the load
using brakes
changing frequency
changing the supply voltage

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Synchronous Motors
A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______

36
16
30
None of the listed here

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Synchronous Motors
When the synchronous motor runs at synchronous speed, the voltage induced in the damper winding is _____

None of the listed here
Maximum
Zero
minimum

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

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

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Synchronous Motors
A synchronous motor is a ______ motor.

Variable speed
Variable pf
Singly fed
None of the listed here

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