2.35 A small sphere of radius rand charge q is enclosed by a spherical shell of radius r2 and charge q2. Show that if q1 is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge q2 on the shell is.

Answers (1)

The potential difference between the inner sphere and shell;

V=\frac{1}{4\pi \epsilon _0}\frac{q_1}{r_1}

So,  the potential difference  is independent of q_2. And hence whenever q1 is positive, the charge will flow from sphere to the shell