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+//example:-11.11,page no.-642.
+// program to obtain the greatest ratio of  off to on attenuation.
+Cj=0.1*10^-12;Rr=1;Rf=5;Li=0.4*10^-9;f=5*10^9;Zo=50;
+w=2*%pi*f;
+Zr=Rr+%i*((w*Li)-(1/(w*Cj)));
+Zf=Rf+(%i*w*Li);
+// for series circuit.
+ILon=-20*log10(abs((2*Zo)/(2*Zo+Zf)));
+ILoff=-20*log10(abs((2*Zo)/(2*Zo+Zr)));
+// for shunt circuit.
+ILon1=-20*log10(abs((2*Zr)/(2*Zr+Zo)));
+ILoff1=-20*log10(abs((2*Zf)/(2*Zf+Zo)));
+disp(ILon,'for series circuit = ')
+disp(ILoff,'for series circuit = ')
+disp(ILon1,'for shunt circuit = ')
+disp(ILoff1,'for shunt circuit = ')
+\ No newline at end of file