So, probably a general question for most of all. It states that there is a charged insulating spherical shell with an inner radius of a/4 (a cavity) and an outer radius of a. The outer shell has a non-constant volume charge density of ρ=(-8α(r^2)). I need to find the electric field magnitude in terms of α of the cavity, the shell itself, and the outside object.
The Attempt at a Solution
To be completely honest, i don't even know where to start. Me and 2 other people have been in a study room for 2 hours trying to figure it out, and the book isn't helping either. We have a theory that the inside has no charge. but that's about it. I'm not even looking for an answer if that would cause my post to be deleted, just maybe a clue on how to go about solving this. Were not sure how to find Q, so we can't even start on the problem. Thanks guys