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Find the inductance of a material with 100 turns, area 12 units and current of 2A in air.(a) 0.75mH(b) 7.5mH(c) 75mH(d) 753mHThis question was addressed to me in unit test.I'd like to ask this question from Magnostatic Energy in division Magnetostics of Electromagnetic Theory

Answer»

The correct choice is (a) 0.75mH

To EXPLAIN: The inductance of any MATERIAL(coil) is given by L = μ N^2A/I. On substituting N = 100, A = 0.12 and I = 2, we get L = 4π X 10^-7 x 100^2 x 0.12/2 = 0.75 units.


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