Shown in the figure a spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting metarial. A charge +Q is placed at the centre of the spherical shell and a total charge -q s placed on the shell. Charge -q is districuted on the surfaces as :

Options

A. `-Q` on the inner surface, `-q` on outer surface
B. `-Q` on the inner surface, `-q + Q` on outer surface
C. `-Q` on the inner surface, `-q - Q` on outer surface
D. The charge -q is spread uniformly between the inner and outer surface

Answer

B