Three Phase Induction Motors If the rotor slots are made deeper, rotor resistance is ______ Increased at starting None of the listed here Decreased at starting Increased under running conditions Increased at starting None of the listed here Decreased at starting Increased under running conditions 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 Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The condition of induction motor at no load resemble those of a transformer whose secondady is _______ Open circuited None of the listed here Supplying a variable resistive load Short-circuited Open circuited None of the listed here Supplying a variable resistive load Short-circuited ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 65% 90% 40% None of the listed here 65% 90% 40% None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The starting torque of a squirrel cage induction motor is Negligible Low Same as full load torque Slightly more than full load torque Negligible Low Same as full load torque Slightly more than full load torque 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 500 W 200 W 980 W 20 W 500 W 200 W 980 W ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS