1. The problem statement, all variables and given/known data Two point charges Q and -Q are separated by a distance d. The point p forms an equilateral triangle with the two charges of side length d. Find the magnitude and direction of the electric field at point p. What is the electric potential at P? Then, a charge of 2Q is placed at P. What is the potential energy of this charge? 2. Relevant equations F = qE V = ∫E dx U = qV 3. The attempt at a solution I was thinking the field at P would be zero bc the negative and positive charges would have a cancelling effect but that doesn't seem right when I think of a field picture. But once I figure out that I think I can figure out the potential and the potential energy of 2Q. To figure out the potential at point p would I integrate with respect to r or x?