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For a P-pole machine, the relation between electrical and mechanical degrees is given by _____________

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For a P-pole machine, the relation between electrical and mechanical degrees is given by _____________

(a) θelec = 2/P θmech

(b) θelec = 4/P θmech

(c) θmech = P/2 θelec

(d) θelec = P/2 θmech

The question was posed to me in examination.

My query is from Terms Pertaining To Rotating Machines topic in section Basic Concepts in Rotating Machines of Electrical Machines

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The correct answer is (d) θelec = P/2 θmech

Explanation: For a P-pole machine, P/2 cycles of EMF will be generated in one revolution, and thus θelec = P/2 θmech.

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