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Calculate the reluctance of a material with length 2π x 10^-4 in air with area 0.5.(a) 1(b) 10(c) 100(d) 1000The question was asked in an interview for internship.This key question is from Magnetic Energy and Circuits in division Magnetic Forces and Materials of Electromagnetic Theory

Answer»

Right choice is (d) 1000

The explanation: The reluctance is given by S = L/μ A, where L is the length, A is the area and μ is the PERMEABILITY. On substituting L = 2π x 10^-4, A = 0.5 and μ = 4π x 10^-7, we GET S = 10^3/(2×0.5) = 1000 units.



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