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+//Ex_2_8
+clc;
+clear;
+close;
+format('v',6);
+//given data : 
+D=0.5;//m(mean diameter)
+A=0.01;//m^2
+fi=10/1000;//Wb
+N=100;//turns
+mmf1=10;//A-turn//(for Ni alloy)
+mmf2=50;//A-turn//(for Si-steel alloy)
+l=%pi*D;//m(total length)
+lni=l/2;//m(length of Ni alloy)
+lsi=l/2;//m(length of Si-steel)
+mmf=mmf1*lni+mmf2*lsi;//A-turn///total mmf
+disp(mmf,"mmf required(A-turn)");
+I=mmf/N;//A
+disp(I,"Current(A)");