Three Phase Induction Motors If the supply voltage of a 3-phase induction motor is increased two times, then torque is _______ Decreased four times Increased two times Decreased two times Increased four times Decreased four times Increased two times Decreased two times Increased four times ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When a 3-phase induction motor is at no load, the slip is ______ Practically zero 0.2 0.5 1 Practically zero 0.2 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Insertion of resistance in the rotor of an induction motor to develop a given torque Decreases the rotor current Increases the rotor current Rotor current becomes zero Rotor current remains same Decreases the rotor current Increases the rotor current Rotor current becomes zero Rotor current remains same ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Reduced voltage starter can be used with Slip ring motor only but not with squirrel cage induction motor Squirrel cage as well as slip ring induction motor None of these Squirrel cage induction motor only but not with slip ring motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage as well as slip ring induction motor None of these Squirrel cage induction motor only but not with slip ring motor ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have The same frequency as the slip frequency The same phase as the rotor e.m.f. Zero frequency High value for the satisfactory speed control The same frequency as the slip frequency The same phase as the rotor e.m.f. Zero frequency High value for the satisfactory speed control ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The crawling in an induction motor is caused by High loads Low voltage supply Harmonics developed in the rotor Improper design of machine High loads Low voltage supply Harmonics developed in the rotor Improper design of machine ANSWER DOWNLOAD EXAMIANS APP
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