Three Phase Induction Motors As load on an induction motor goes on increasing Its power factor goes on increasing up to full load and then it falls again Its power factor remains constant Its power factor goes on increasing even after full load Its power factor goes on decreasing Its power factor goes on increasing up to full load and then it falls again Its power factor remains constant Its power factor goes on increasing even after full load Its power factor goes on decreasing ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have High value for the satisfactory speed control The same phase as the rotor e.m.f. Zero frequency The same frequency as the slip frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. Zero frequency The same frequency as the slip frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed ______ Remains unchanged Is decreased Is increased None of the listed here Remains unchanged Is decreased Is increased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Changing winding resistance Changing number of poles Reducing supply voltage Changing supply frequency Changing winding resistance Changing number of poles Reducing supply voltage Changing supply frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A 3 phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is _______ 20 W 980 W 200 W 500 W 20 W 980 W 200 W 500 W ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The frame of an induction motor is usually made of Bronze Silicon steel Aluminium Cast iron Bronze Silicon steel Aluminium Cast iron ANSWER DOWNLOAD EXAMIANS APP
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