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In a three phase induction motor of rotor impedance as (0.2+j0.2), rotor current in each phase lags behind the generated emf in that phase to rotor by a power factor angle of _________(a) 45°(b) 135°(c) 90°(d) 0°I had been asked this question by my school principal while I was bunking the class.This interesting question is from Flux and MMF Phasors and Waves in Induction Motors in chapter Induction Machines of Electrical Machines

Answer» CORRECT OPTION is (a) 45°

The best explanation: The power factor angle WOULD be ATAN(0.2/0.2) = 45°.


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