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Synchronous Motors
The size of a synchronous motor is determined by its _____
kW rating
kVAR rating
kVA rating
None of the listed here
kW rating
kVAR rating
kVA rating
None of the listed here
Answer
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Related Question
Synchronous Motors
The construction of a synchronous motor ressembles
A rotary converter
A series motor
An induction motor
An alternator
A rotary converter
A series motor
An induction motor
An alternator
Answer
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Synchronous Motors
Power factor of a synchronous motor is unity when
The armature current is zero
The armature current is minimum
The armature current is maximum
None of the listed here
The armature current is zero
The armature current is minimum
The armature current is maximum
None of the listed here
Answer
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Synchronous Motors
The power factor of a synchronous motor is better than that of induction motor because
mechanical load on the motor can be adjusted
stator supply is relieved of responsibility of producing magnetic field
synchronous motor has large air gap
synchronous motor runs at synchronous speed
mechanical load on the motor can be adjusted
stator supply is relieved of responsibility of producing magnetic field
synchronous motor has large air gap
synchronous motor runs at synchronous speed
Answer
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Synchronous Motors
The induced e.m.f. in a synchronous motor working on leading power factor will be
more than the supply voltage
less than the supply voltage
equal to the supply voltage
None of these
more than the supply voltage
less than the supply voltage
equal to the supply voltage
None of these
Answer
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Synchronous Motors
While running, a synchronous motor is compelled to run at synchronous speed because of _______
Magnetic locking between stator and rotor poles
Induced emf in rotor field winding by stator flux
Damper winding in its pole faces
Compulsion due to lenz's law
Magnetic locking between stator and rotor poles
Induced emf in rotor field winding by stator flux
Damper winding in its pole faces
Compulsion due to lenz's law
Answer
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