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+//Example number 8.7, Page number 172
+
+clc;clear;
+close;
+
+//Variable declaration
+H=1800;      //magnetizing force(amp/m)
+chi=3*10**-5;    //magnetic flux(wb)
+A=0.2*10**-4;    //area(m**2)
+//Calculation
+B=chi/A;
+mew=B/H;     //permeability(henry/m)
+//Result
+printf("permeability is %.3e H/m^2",mew)
+//answer in the book is wrong