A small sphere of radius `r_1` and charge `q_1` is enclosed by a spherical shell of radium `r_2` and charge `q_2`. Show that if `q_1` is positive , charge will neecessarily flow from the sphere to the shell ( when the two are connected by a wire ) no matter what the charge `q_2` on the shell is .

Explanation

As the charge resides always on the outer surface of the shell therefore , when the sphere and shell therefore , when the sphere and shell are connected by a wire , charge will flow essentially from the sphere to the shell , whatever be the magnitude and sign of charge `q_2`.