1. The problem statement, all variables and given/known data I dont exactly conceptually understand what the potential is. The electric field is a vector at a given point from the charge that describes the strenght and the direction of the fields. Potential is given as a potential of a point in referenve to another point in spave? I have uploaded the picture od a segment of my lecture today where it discribes that there exists a constant in the potential formula which dissapears when we introduce the potential difference.. 2. Relevant equations 3. The attempt at a solution Can someone give a little insight in what it is if you understand what i mean? The potential of a point A is known but the potential of A' is potential of point A plus some constant which is electric field line integral from R to R'. How is that constant if R' is arbitrarily chosen?