Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will refused ro start Will overheat in spots Will fail to pull into step Will not come upto speed Will refused ro start Will overheat in spots Will fail to pull into step Will not come upto speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field of a synchronous motor is underexcited, the power factor will be zero lagging unity leading zero lagging unity leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the back e.m.f. will be more than the supply voltage the stator current will be very high the stator current will be very small the stator current will be zero the back e.m.f. will be more than the supply voltage the stator current will be very high the stator current will be very small the stator current will be zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While running, a synchronous motor is compelled to run at synchronous speed because of _______ Induced emf in rotor field winding by stator flux Compulsion due to lenz's law Magnetic locking between stator and rotor poles Damper winding in its pole faces Induced emf in rotor field winding by stator flux Compulsion due to lenz's law Magnetic locking between stator and rotor poles Damper winding in its pole faces ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed of a synchronous motor can be changed by varying _______ Field excitation Supply frequency None of the listed here Mechanical load Field excitation Supply frequency None of the listed here Mechanical load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at speed ranging from ______ None of the listed here 3600 to 6000 rpm 1800 to 3600 rpm 150 to 1800 rpm None of the listed here 3600 to 6000 rpm 1800 to 3600 rpm 150 to 1800 rpm ANSWER DOWNLOAD EXAMIANS APP
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