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Mechanical power developed in the braking region of the induction motor is _________

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Mechanical power developed in the braking region of the induction motor is _________

(a) negative

(b) positive

(c) zero

(d) any of the mentioned

This question was addressed to me by my college professor while I was bunking the class.

This intriguing question comes from Analysis of the Equivalent Circuit topic in section Induction Machines of Electrical Machines

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The correct option is (a) negative

Easiest explanation: slip is more than one, so Pm will be negative.

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