A solid sphere of radius `R_1` and volume charge density `rho=(rho_0)/r` is enclosed by a hollow sphere of radius `R_2` with negative surface charge density `'sigma'`, such that the total charge in the system is zero, `rho_0` is a positive constant and r is the distance from the centre of the sphere. The ratio `R_2/R_1` is

Options

A. `sigma/rho_0`
B. `sqrt((2sigma)/rho_0`
C. `sqrt(rho_0/((2sigma))`
D. `rho_0/sigma`

Answer

C