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Synchronous Motors
A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______
16
30
36
None of the listed here
16
30
36
None of the listed here
Answer
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Related Question
Synchronous Motors
If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then
it runs at a slower speed
it runs at a very high speed
it continues to run at the same speed
the motor stops
it runs at a slower speed
it runs at a very high speed
it continues to run at the same speed
the motor stops
Answer
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Synchronous Motors
A rotary converter can also be run as a
Dc series generator
Dc shunt generator
Dc compound generator
Synchronous motor
Dc series generator
Dc shunt generator
Dc compound generator
Synchronous motor
Answer
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Synchronous Motors
The mechanical power developed by a synchronous motor is ______ stator voltage.
Invesely proportional to
Directly proportional to
Directly proportional to square of
Independent of
Invesely proportional to
Directly proportional to
Directly proportional to square of
Independent of
Answer
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Synchronous Motors
The speed of a synchronous motor can be changed by varying _______
Mechanical load
Field excitation
Supply frequency
None of the listed here
Mechanical load
Field excitation
Supply frequency
None of the listed here
Answer
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Synchronous Motors
The duration of sudden short circuit test on synchronous motor is usually about
One minute
One second
One hour
None of the listed here
One minute
One second
One hour
None of the listed here
Answer
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