Physics

Problem

A solid sphere of radius R has a volume charge density

\rho = \rho_0 r^2

(Where

\rho_0

is a constant and r is the distance from centre). At a distance x from its centre (for

x < R

), the electric field is directly proportional to: (a)

1/x^2

(b)

1/x

(c)

x^3

(d)

x^2