1. The problem statement, all variables and given/known data A positive charge q is in the center of an espheric hole of radius R inside a dielectric material with constant Ke. Find the electric field module inside the dielectric in a point very near to the hole surface and the polarization charge over the surface. 2. Relevant equations Gauss Law, Equations of capacitors. 3. The attempt at a solution I try to build a gaussian surface in wich i can apply gauss law, but i didn't find the way to get only one indeterminant (E for example, or qp) Thank you very much for your help!!