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Synchronous Motors
The speed of a synchronous motor
Increases as the load increases
None of the listed here
Always remains constant
Decreases as the load decreases
Increases as the load increases
None of the listed here
Always remains constant
Decreases as the load decreases
Answer
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Related Question
Synchronous Motors
In a synchronous motor, the magnitude of stator back emf depends on _____
Dc excitation only
Speed of the rotor
Load on the motor
Both the speed and rotor flux
Dc excitation only
Speed of the rotor
Load on the motor
Both the speed and rotor flux
Answer
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Synchronous Motors
A synchronous motor can be used as a synchronous capacitor when it is
Under excited
Over loaded
Over excited
Under loaded
Under excited
Over loaded
Over excited
Under loaded
Answer
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Synchronous Motors
Which of the following motors is non self starting?
Dc series motor
Wound rotor induction motor
Synchronous motor
Squirrel cage induction motor
Dc series motor
Wound rotor induction motor
Synchronous motor
Squirrel cage induction motor
Answer
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Synchronous Motors
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as
pull-in torque
pull-out torque
None of these
pull-up torque
pull-in torque
pull-out torque
None of these
pull-up torque
Answer
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Synchronous Motors
When the field of a synchronous motor is under-excited, the power factor will be
leading
lagging
zero
unity
leading
lagging
zero
unity
Answer
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