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 twice equal less more twice equal less ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the rotor copper loss are met by ______ Dc source Armature input Supply lines Motor input Dc source Armature input Supply lines Motor input ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is supplied with unbalanced voltage over-loaded None of these under-loaded supplied with unbalanced voltage over-loaded None of these under-loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Copper loss Bearing friction loss Windage loss Core loss Copper loss Bearing friction loss Windage loss Core loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field of a synchronous motor is underexcited, the power factor will be lagging zero leading unity lagging zero leading unity ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Eddy current flow Shorting of coils Increased core losses Rise in winding temperature Eddy current flow Shorting of coils Increased core losses Rise in winding temperature ANSWER DOWNLOAD EXAMIANS APP
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