Synchronous Motors Slip rings in a synchronous motor carry Direct current Alternating current No current All of the listed here Direct current Alternating current No current All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The mechanical power developed by a synchronous motor is independent of _________. Field excitation Speed Torque angle Applied stator voltage Field excitation Speed Torque angle Applied stator voltage ANSWER DOWNLOAD EXAMIANS APP
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 no change of power factor leading power factor with over-excitation lagging power factor with over-excitation leading power factor with under-excitation no change of power factor leading power factor with over-excitation lagging power factor with over-excitation leading power factor with under-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Increase Remain unchanged Decrease None of the listed here Increase Remain unchanged Decrease None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Most of the synchronous motors are _______ power factor metors. 0.5 leading Unity 0.8 lagging 0.8 leading 0.5 leading Unity 0.8 lagging 0.8 leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The back e.m.f. of a synchronous motor depends on load speed All of these load angle load speed All of these load angle ANSWER DOWNLOAD EXAMIANS APP
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