Repeat Problem 3.8, but use D = and take an appropriate volume integral. In Problem

Repeat Problem 3.8, but use ∇ ·D = ρν and take an appropriate volume integral.

In Problem

Use Gauss’s law in integral form to show that an inverse distance field in spherical coordinates, D = Aa_r /r , where A is a constant, requires every spherical shell of 1 m thickness to contain 4πA coulombs of charge. Does this indicate a continuous charge distribution? If so, find the charge density variation with r.