Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation leading power factor with over-excitation no change of power factor lagging power factor with over-excitation leading power factor with under-excitation leading power factor with over-excitation no change of power factor lagging power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a practical synchronous motor will occur when the torque angle is about _____ 0° 45° 30° 75° 0° 45° 30° 75° ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor which loss varies with load ? Windage loss Core loss Copper loss Bearing friction loss Windage loss Core loss Copper loss Bearing friction loss ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Change of D.C. excitation of a synchronous motor changes Power factor of power drawn by the motor Applied voltage of the motor Motor speed Any of the above Power factor of power drawn by the motor Applied voltage of the motor Motor speed Any of the above ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A rotary converter can also be run as a Synchronous motor Dc compound generator Dc series generator Dc shunt generator Synchronous motor Dc compound generator Dc series generator Dc shunt generator ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor is used for Power factor corrections Fluctuating loads Variable speed loads Low torque loads Power factor corrections Fluctuating loads Variable speed loads Low torque loads ANSWER DOWNLOAD EXAMIANS APP
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