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+clc;
+//page no 462
+//prob no. 14.2
+//a)Determination of impedance of open wire with diameter 3mm & r=10mm
+D=3/2;r=10;//All values are in mm
+Zo1=276*log10(r/D); 
+disp('ohm',Zo1,'a)The characteristic impedance of conductor is');
+//b)Determination of impedance of coaxial with er=2.3,inner diameter=2mm & outer diameter=8mm
+er=2.3;D=8;d=2;//All diameter values in mm
+Zo2=(138/sqrt(er))*log10(D/d);
+disp('ohm',Zo2,'b)The characteristic impedance of coaxial cable is');
+\ No newline at end of file