1. The problem statement, all variables and given/known data My problem is from book Electromagnetic with applications by Kraus & fleisch.problem no. 2-5-2. In the problem "two conductor" line is given & magnitude of electric field due to this on a co ordinate(43cm,32cm) is also given=450v/m. Radius of conductor, Position of center of conductor on coordinate sys. is also given. we have to calculate Voltage difference between conductor. 2. Relevant equations voltage diff between origin & any point x=(p/(2*pi*epsilon))*ln(r1/r2) where p= charge density of line r1 & r2 are distance between both wires and pt x. 3. The attempt at a solution I calculated electric fld due to both wires & vector summed that. & equated it s magnitude with given value. With this i found value of p/(2*pi*epsilon). And calculated voltage between origin & conductor. Since both conductor are symmetrical to origin I doubled value of voltage to get voltage between conductor. But i am getting around 730 v. While i should get 1130v. If anybody has that book then it would be more helpful coz it was a bit complicated to explain everything here.