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Synchronous Motors

Synchronous Motors
The size of a synchronous motor is determined by its _____

kVAR rating
kVA rating
kW rating
None of the listed here

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Synchronous Motors
A synchronous motor runs at speed ranging from ______

None of the listed here
150 to 1800 rpm
1800 to 3600 rpm
3600 to 6000 rpm

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Synchronous Motors
The back e.m.f. of a synchronous motor depends on

speed
load
load angle
All of these

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

changing the supply voltage
changing frequency
using brakes
changing the load

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Synchronous Motors
When a unity pf synchronous motor is operated at a leading pf, it results in _______

More than rated rotor current
More than rated horseppwer output
Less than rated horsepower output
None of the listed here

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Synchronous Motors
The back emf in the stator of a synchronous motor depends on

Flux density
Rotor speed
Rotor excitation
None of the listed here

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