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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 2 : BESICS OF MAGNETIC CIRCUITS 
+// Example : 2.6
+
+clc;clear; // clears the console and command history 
+
+// Given data
+N = 200      // number of turns 
+d_in = 7    // inner diameter of wooden toroidal coil in cm
+d_out = 10  // outer diameter  of wooden toroidal coil in cm
+A = 0.005  // cross sectional area m^2
+I = 5      // current through coil in A
+R = d_out-d_in 
+myu_0 = 4*%pi*10^-7
+
+// caclulations 
+l = 2*%pi*R*10^-2  // mean circumference length in m
+H = N*I/l          // magnetic field intensity in At/m
+B = myu_0*H        // flux density in Wb/m^2
+flux = B*A        // flux in Wb
+
+// display the result 
+disp("Example 2.6 solution");
+printf(" \n Magnetic field intensity  \n H= %.0f At/m \n", H);
+printf(" \n Flux density \n B= %.2e Wb/m^2 \n", B);
+printf(" \n Flux \n flux= %.1e Wb \n", flux);