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+// Chapter 9 Example 7//
+clc
+clear
+// distance between conductors=d,diameter of conductors=d1,radius of conductor=r,height of the conductors from ground=h //
+d=4;// in m//
+d1=0.02;// in m//
+r=d1/2;
+h=8;
+// capacitance between conductors=cab//
+cab=(%pi*10^-9/(36*%pi))/(log(d/r)*(1/sqrt(1+(d/(2*h))^2)))*10^12;// to convert to pico farad multiply by 10^12 //
+printf("\n The capacitance between conductors = %.2f pF/m\n",cab);
+// capacitance between phase and neutral plane=can=cbn//
+can=2*cab;
+printf("\n The capacitance phase and neutral plane = %.2f pF/m\n",can);
+// capacitance betweem the conductors when effect of earth is ignored =cab1//
+cab1= %pi*((10^-9)/(36*%pi))*10^12/(log(d/r));
+printf("\n The capacitance between conductors when effect of ground ignored = %.2f pF/m\n",cab1);
+// charging current =ic ,frequency of operation of conductors=f,voltage which charging is done=v//
+f=50;// in Hz//
+v=33*10^3;// in V//
+w=2*%pi*f;
+ic=w*cab*10^-12*10*10^3*v;// multiplying factors to get the answer in A//
+printf("\n Charging Current = %.3f A\n",ic);