The frequency of rotor current is :

An eight pole wound rotor induction motor operating on 60 Hz supply is driven at 1800 rpm by a prime mover in the opposite direction of revolving magnetic field. The frequency of rotor current is
(a) 60 Hz
(b) 120 Hz
(c) 180 Hz
(d) 200 Hz

Anurag Mishra Professor Asked on 1st February 2016 in Physics.
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    Answer: (c) 180 Hz 

    Anurag Mishra Professor Answered on 21st May 2016.
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