Homework Statement
I want to derive the following equation. It is the potential energy of an electron inside a nucleus assumed to be a uniformly charged sphere of R.Homework Equations
V'(r) =( -Ze2/4∏ε0R)(3/2 - (1/2)(r/R)^2)
The Attempt at a Solution
I get E = Ze2r/(4∏ε0R3)
But I am having...