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 less more equal twice less more equal twice ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors While starting a salient pole synchronous motor by induction motor action and connecting field discharge resistance across field, starting and accelerting torque is produced by induction motor torque in damper winding eddy current and hysteresis torque in pole faces induction motor torque in field winding All of the listed here induction motor torque in damper winding eddy current and hysteresis torque in pole faces induction motor torque in field winding All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ 16 None of the listed here 36 30 16 None of the listed here 36 30 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can operate at Lagging power factor only Leading power factor Unity power factor only Lagging, leading and unity power factors Lagging power factor only Leading power factor Unity power factor only Lagging, leading and unity power factors ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor behaves as _____ A capacitor An inductor A resistor None of the listed here A capacitor An inductor A resistor None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at 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 normal load with zero excitation ANSWER DOWNLOAD EXAMIANS APP
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