The region between two concentric conducting spheres with radii a and b is filled with
a conducting material with resistivity p.
(a) Show that the resistance between the spheres is given by

(b) Derive an expression for the current density as a function of radius, in terms of the potential difference Vab between the spheres.
(c) Show that the result in part (a) reduces to Eq. (25.10) when the separation L = b - a between the spheres is small.

Transcribed Image Text:

R. 4т(а b)