Synchronous Motors If a synchronous motor is operating at a supply frequency of 50 cycles/second, then, rotor revolves at ______ 25 cycles/ second 100 cycles/second None of the listed here 50 cycles/second 25 cycles/ second 100 cycles/second None of the listed here 50 cycles/second ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ? By changing the supply frequency By interchanging any two phases By changing the applied voltage By changing the load By changing the supply frequency By interchanging any two phases By changing the applied voltage By changing the load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An over excited synchronous motor behaves as _____ A capacitor None of the listed here A resistor An inductor A capacitor None of the listed here A resistor An inductor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The induced e.m.f. in a synchronous motor working on leading power factor will be less than the supply voltage equal to the supply voltage None of these more than the supply voltage less than the supply voltage equal to the supply voltage None of these more than the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The speed regulation of a synchronous motor is always 1% Positive Zero 0.5% 1% Positive Zero 0.5% 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 normal load with minimum excitation no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation no-load and under-excited fields ANSWER DOWNLOAD EXAMIANS APP
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