Synchronous Motors A synchronous motor will always stop when Supply voltage frequency changes Load in motor varies Supply voltage fluctuates Excitation winding gets disconnected Supply voltage frequency changes Load in motor varies Supply voltage fluctuates Excitation winding gets disconnected ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation normal load with zero excitation no-load and greatly over-excited fields no-load and under-excited fields normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Remain unchanged Increase None of the listed here Decrease Remain unchanged Increase None of the listed here Decrease 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 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 no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Hunting in a synchronous motor cannot be due to variable frequency windage friction variable load variable supply voltage variable frequency windage friction variable load variable supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can develop synchronous torque when under loaded while over-excited below or above synchronous speed only at synchronous speed when under loaded while over-excited below or above synchronous speed only at synchronous speed ANSWER DOWNLOAD EXAMIANS APP
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