Three Phase Induction Motors If a 3-phase induction motor is running at slip S, then rotor copper loss is equal to (1-S) × rotor input (1+S) × rotor input S × rotor input None of the listed here (1-S) × rotor input (1+S) × rotor input S × rotor input None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is 1.5 Hz 5 Hz 0.05 Hz 2.5 Hz 1.5 Hz 5 Hz 0.05 Hz 2.5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The full load slip of a 3-phase induction motor ranges from 20 to 30 % 10 to 20 % 2 to 5 % None of the listed here 20 to 30 % 10 to 20 % 2 to 5 % None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The torque developed by a 3 phase induction motor least depends on Rotor power factor Shaft diameter Rotor current Rotor emf Rotor power factor Shaft diameter Rotor current Rotor emf 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 frequency as the slip frequency The same phase as the rotor e.m.f. High value for the satisfactory speed control Zero frequency The same frequency as the slip frequency The same phase as the rotor e.m.f. ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Reduced voltage starter can be used with None of these Squirrel cage as well as slip ring induction motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage induction motor only but not with slip ring motor None of these Squirrel cage as well as slip ring induction motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage induction motor only but not with slip ring motor ANSWER DOWNLOAD EXAMIANS APP
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