Question

A non-conducting spherical shell, with an inner radius of R1 and an outer radius of R2, has carge spread non-uniformly through its volume between its inner and outer surfaces, where the volume charge density r is given by r=k/r with the distance r frome the center of the shell and a constant k.
(a) Find the net charge Q of the shell
(b) Calculate the electric field E at a distance R frome the center over the range 0 ￡R￡￥
(c) Fin the maximum E.