At which of a following speed the generators for 3 phase, 50 Hz supply will not run?

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Mr. Dubey

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Q. At which of a following speed the generators for 3 phase, 50 Hz supply will not run?

(A) 166? rpm
(B) 250 rpm
(C) 750 rpm
(D) 1200 rpm

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✅ Correct Answer: (D) 1200 rpm

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