Question: A conductor with resistivity p bounds on a dielectric with permittivity e. At a certain point A at the conductor's surface the electric displacement equals

A conductor with resistivity p bounds on a dielectric with permittivity e. At a certain point A at the conductor's surface the electric displacement equals D, the vector D being directed away from the conductor and forming an angle a with the normal of the surface. Find the surface density of charges on the conductor at the point A and the current density in the conductor in the vicinity of the same point.

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