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Approximately the efficiency of the rotor of the induction motor depends on the _________(a) rotor speed(b) synchronous speed(c) rotor speed and synchronous speed(d) magnetic field speedThe question was posed to me during a job interview.This intriguing question originated from Induction Motor Phasor Diagram in section Induction Machines of Electrical Machines

Answer»

The CORRECT OPTION is (c) rotor speed and SYNCHRONOUS speed

Best explanation: Efficiency of the rotor is approximately EQUAL to ratio of speed of rotor to synchronous speed.



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