Three Phase Induction Motors A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be 20 Hz 200 Hz 2 Hz 50 Hz 20 Hz 200 Hz 2 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the air gap between the rotor and stator of a 3-phase induction motor is increased, then_______ None of the listed here Leakage reactances are increased Leakage reactances are decreased No load current is decreased None of the listed here Leakage reactances are increased Leakage reactances are decreased No load current is decreased ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shape of the torque/slip curve of induction motor is Hyperbola Rectangular parabola Straight line Parabola Hyperbola Rectangular parabola Straight line Parabola ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The 3- phase induction motor is so designed that the rotor should have ______ under running conditions. Large slip Low resistance High reactance high resistance Large slip Low resistance High reactance high resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If a 3-phase induction motor is running at slip S, then rotor copper loss is equal to None of the listed here (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 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If a 3 phase induction motor is running at a slip S, then approximate efficiency of the motor is ______ 1-S None of the listed here 1+S S-1 1-S None of the listed here 1+S S-1 ANSWER DOWNLOAD EXAMIANS APP
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