1. The problem statement, all variables and given/known data How do I find the electric field at a point above the center of a charged sphere? Assume the sphere is a shell. 2. Relevant equations 3. The attempt at a solution\ I know there will only be a z component to the electric field, because x and y components will cancel by symmetry. I think the process will have to involve integrating over the surface of the sphere. Where do I start? More things I know (or think I know): dq = σdA The dA terms will point radially from the sphere.