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Homework Statement
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.
Homework Equations
Gauss Law, Equations of capacitors.
The Attempt at a Solution
I try to build a gaussian surface in which 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!