1. The problem statement, all variables and given/known data Consider a hollow spherical conductor with total charge +5e. The outer and inner radii are a and b, respectively. (a) Calculate the charge on the sphere's inner and outer surfaces if a charge of -3e is placed at the center of the sphere. (Use the following as necessary: e.) 2. Relevant equations Gauss's Law? 3. The attempt at a solution I honestly don't have much of a clue. I feel like the problem should be pretty simple, but I'm not grasping all the aspects of Gauss's Law. I hypothesized that the charge was 0 on the inner surface, and surmised that the charge on the outer surface should be equal to the total charge. This was wrong. I then hypothesized that the inner charge would be -3e and that the outer charge would need to be added to this to result in 5e, so 8e. Also not correct.