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+//ex2.11 find the value of R so that line is treated as lowloss line.
+l=0.25e-6;
+c=100e-12;
+g=0;
+f=100e6;
+w=2*%pi*f;
+b=w*sqrt(l*c);
+disp('The phase constant of the low-loss line is = '+string(b));
+a=b/100;
+r=a*sqrt(l/c)*2;
+disp('the value of resistance should be = '+string(r)+' ohm/m');
+