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Synchronous Motors
The back e.m.f. of a synchronous motor depends on
load
speed
load angle
All of these
load
speed
load angle
All of these
Answer
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Related Question
Synchronous Motors
The angle between the rotor poles and stator poles, in a synchronous motor, is known as
Angle of retardation
Synchronising angle
Power factor angle
Torque angle
Angle of retardation
Synchronising angle
Power factor angle
Torque angle
Answer
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Synchronous Motors
Leading power factor synchronous motors cost ______ the unity pf motors.
None of the listed here
Less than
About the same as
More than
None of the listed here
Less than
About the same as
More than
Answer
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Synchronous Motors
If the field of a synchronous motor is underexcited, the power factor will be
lagging
zero
unity
leading
lagging
zero
unity
leading
Answer
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Synchronous Motors
Change of D.C. excitation of a synchronous motor changes
Power factor of power drawn by the motor
Any of the above
Applied voltage of the motor
Motor speed
Power factor of power drawn by the motor
Any of the above
Applied voltage of the motor
Motor speed
Answer
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Synchronous Motors
Synchronous capacitor is
None of the listed here
An ordinary static capacitor bank
An over excited synchronous motor driving mechanical load
An over excited synchronous motor running without mechanical load
None of the listed here
An ordinary static capacitor bank
An over excited synchronous motor driving mechanical load
An over excited synchronous motor running without mechanical load
Answer
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