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+// Scilab code Ex4.11: Pg 125-126 (2008)

+clc; clear;

+mew_o = 4*(%pi)*1e-07;          // Pemeability for free space

+l = 0.15;                       // Mean length, m

+N = 2500;                      // Number of turns

+I = 0.3;                       // Electric current, A

+// Since magnetic field strength is defined as the mmf per metre length of the magnetic circuit, therefore, we have

+H = (N*I)/l;                   // Magnetic field strength, At/m

+B = 0.75;                      // Flux density( value taken from graph ), T

+// Since B = ( mew_r * mew_o * H ), solving for mew_r

+mew_r = B/(mew_o * H);               // Relative permeability

+printf("\nThe flux desity of given toroid = %3.2f T ", B);

+printf("\nThe relative permeability of given toroid = %5.1f", mew_r);

+

+// Result

+// The flux desity of given toroid = 0.75 T

+// The relative permeability of given toroid = 119.4