1. The problem statement, all variables and given/known data A charged partricle is moved from a great distance to a distance d from a point charge. At distance d, the electric field has a strength E and a potential V. Which of the following represents the work done per unit charge q? 2. Relevant equations F = Eq; V = Ed, E = kq/r^2; U = Eqd, U = kq1q1//r 3. The attempt at a solution In a previous thread, it was learned that the potential energy of a charged particle is denoted as U = Vq, where q is the charge being affected by the electric field. Now, a slightly different scenario is presented. The same particle is moved from an infinite distance to a distance d to a point source charge. The amount of work done here is the W = Eqd, a derivative of F=ma. The main difference between the problem before and the problem here is the "distance". If we know the distance the charge was brought from far away to nearer to the point charge, then we can calculate the work done on the particle. This is the formula U =Eqd. Is my thought processes correct here? Thanks in advance!