Two non-conducting solid spheres of radii and

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two non-conducting solid spheres of radii

R

and

2R

, having uniform volume charge densities

\rho_1

and

\rho_2

respectively, touch each other. The net electric field at a distance

2R

from the centre of the smaller sphere, along the line joining the centres of the spheres, is zero. The ratio

\frac{\rho_1}{\rho_2}

can be (1)

-4

(2)

-\frac{32}{25}

(3)

\frac{32}{25}

(4)

4