1. The problem statement, all variables and given/known data A continuous line of charge lies along the x axis, extending from x=+xo to positive infinity. The line carries charge with a uniform linear charge density lambda. What are the magnitude and direction of the electric field at the origin? 2. Relevant equations E = lambda/2pieor for the magnitude of electric field produced by a uniformly charged infinite line. 3. The attempt at a solution I have drawn a cylindrical Gaussian Surface around it. By the wording of the question, I am not sure where the line of charge is placed (does it start at the origin?). I have placed the line at the origin, with the cylinder starting at the origin. I have concluded (not sure if it is correct) that the field on the end of the cylinder is equal to zero, because the field can only pass through the center of the circle. Am I close at all to the answer?