3. One charged sphere of conducting material, with radius R is surrounded by a dielectric (with known spherical shell with internal radius R (meaning that it is tightly wrapped around the conductor) and external radius 3R. What is the expression of the electric eld in dependence of the distance 'om the centre of the sphere, inside the conducting sphere, within the dielectric shell and outside of it?r What it the potential with respect to innityr at the external surface of the dielectric shell? And at the internal surface? free [Remember that the Gauss law in dielectrics is p K E - dd = 9%.] Cl