%PROGRAM TO FIND OUT POTENTIAL DUE TO A LINE CHARGE
%BETWEEN TWO POINTS
%(or)
%POTENTIAL DUE TO A COAXIAL CABLE

%CAPACITANCE OF A COAXIAL CAPACITANCE

clear all;
close all;
clc;

float Eo=8.854*pow(10,-12);
void main()
{
	float C,n,q,v,pl,a,b,Er;
	clrscr();
	printf("Enter values of q,pl,a,b,Er");
	scanf("%f%f%f%f%f",&q,&pl,&a,&b,&Er);
	n=b/a;
	v=(pl*log(n))/(2*3.14*Eo*Er);
	C=q/v;
	printf("capacitance=%1.29f",C);
	getch();
}



a = input('Enter the value of inner cylinder radius');
b = input('Enter the value of outer cylinder radius');
PL = input('Enter the value of Line charge density in couloms/metre');
epsilon_0 = input('Enter the value of free  space permittivity');
epsilon_r = input('Enter the value of relative permittivity');
q = input('Enter the value of point charge');

V = (PL*log(b/a))/(2*pi*epsilon_0*epsilon_r);

disp('Capacitance of Coaxial Cable')
C = q/V