1.

A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm^2. The inductor of the coil corresponding to a magnetizing electric current of 3 A will be?(a) 37.68 μH(b) 47.68 μH(c) 113.04 μH(d) 120.58 μHThe question was asked in an interview.I would like to ask this question from Advanced Problems on Millman’s Theorem and Maximum Power Transfer Theorem in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer»

The correct CHOICE is (c) 113.04 μH

The explanation: INDUCTANCE of the COIL, L = \(\frac{μ_0 n^2 A}{l}\)

= \(\frac{4π X 10^{-7}X 300 X 300 X 300 X 10^{-6}}{300 X 10^{-3}}\)

= 113.04 μH.



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