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What is the formula of the effective permeance of conductor portion?

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What is the formula of the effective permeance of conductor portion?

(a) effective permeance of conductor portion = 1/total flux linkages * total turns * total mmf

(b) effective permeance of conductor portion = total flux linkages / total turns * total mmf

(c) effective permeance of conductor portion = total flux linkages * total turns * total mmf

(d) effective permeance of conductor portion = total flux linkages * total turns / total mmf

This question was posed to me by my school principal while I was bunking the class.

The doubt is from Determination of Iron Losses & Slot Leakage topic in chapter Principles of Magnetic Circuit Design of Design of Electrical Machines

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Correct answer is (b) effective permeance of conductor portion = total flux linkages / total turns * total mmf

The best I can explain: The total flux linkages, total turns and total mmf is first calculated. On substitution the effective permeance of conductor portion is obtained.

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