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25-02-2024
Physics

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The stator and the rotor of a 3-phase, 4-pole wound rotor induction motor are excited respectively from a 50 Hz and a 30 Hz source of appropriate voltage. Neglecting all losses, what is/are the possible no-load speed/speeds at which the motor would run?

A. 2400 rpm only
B. 1500 rpm and 900 rpm
C. 2400 rpm and 600 rpm
D. 600 rpm only

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