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If the voltage and frequency of the induction machine is reduced to 50% of the operating region,the slip of the machine will be?

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If the voltage and frequency of the induction machine is reduced to 50% of the operating region,the slip of the machine will be?

(a) 2*s

(b) s

(c) 1/2s

(d) 1/s

This question was addressed to me in final exam.

This intriguing question originated from Induction Motor Phasor Diagram topic in division Induction Machines of Electrical Machines

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Best answer
The correct option is (a) 2*s

Best explanation: Slip α 1/f; Even though the flux remains constant as the v/f ratio is constant.

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