Which of the following expressions depicts the coefficient of self-ind – McqOptions

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1.	Which of the following expressions depicts the coefficient of self-inductance?(Where l = length of magnetic circuit and a = area of cross-section of magnetic circuit through which flux is passing - permeability).
A.	N2μa/l
B.	N3μa/l
C.	N2a/μl
D.	N2μal
Answer» B. N3μa/l

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