1. The problem statement, all variables and given/known data A solid insulating sphere of radius R carries a charge per unit volume of p. Use Gauss' law to find an expression for the eletric field on a spherical surface of radius R/2 ie: inside the sphere. 2. Relevant equations Gauss' Law = (Net Flux = Q / Eo) Volume of a Sphere = (4/3)(pi)(R^3) 3. The attempt at a solution I simply combined Gauss' Law and the volume of the sphere to get, E = (4Q) / [(3)(pi)(Eo)((R/2)^3)] That seems to easy though have I missed something?