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 Damper winding in its pole faces Magnetic locking between stator and rotor poles Induced emf in rotor field winding by stator flux Compulsion due to lenz's law Damper winding in its pole faces Magnetic locking between stator and rotor poles ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The construction of a synchronous motor ressembles A series motor An alternator An induction motor A rotary converter A series motor An alternator An induction motor A rotary converter ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Normally excited All of these Under-excited Over-excited Normally excited All of these Under-excited Over-excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed regulation of a synchronous motor is always Zero 0.5% Positive 1% Zero 0.5% Positive 1% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor develops maximum power when load angle is 60° 45° 90° 120° 60° 45° 90° 120° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is more equal less twice more equal less twice ANSWER DOWNLOAD EXAMIANS APP
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