Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have 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 High value for the satisfactory speed control Zero frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When a 3-phase induction motor is at no load, the slip is ______ Practically zero 1 0.5 0.2 Practically zero 1 0.5 0.2 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 _______ 500 W 20 W 980 W 200 W 500 W 20 W 980 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 1200 rpm 300 rpm 600 rpm 1000 rpm 1200 rpm 300 rpm 600 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor the relationship between stator slots and rotor slots is that Stator slots are equal to rotor slots Stator slots are not exact multiple of rotor slots None of the listed here Stator slots are exact multiple of rotor slots Stator slots are equal to rotor slots Stator slots are not exact multiple of rotor slots None of the listed here Stator slots are exact multiple of rotor slots ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Less maintenance troubles are experienced in case of Squirrel cage induction motor None of these Both (A) and (B) Slip ring induction motor Squirrel cage induction motor None of these Both (A) and (B) Slip ring induction motor ANSWER DOWNLOAD EXAMIANS APP
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