is concentric with the first shell. The flux is as follows for the different regions of this arrangement.

$=-10\mathrm{.}1{10}^{3}N*\frac{m^2}{C}$ for $r{R}_2$

Determine the magnitude and sign of the point charge and the charge on the surface of the two shells.

point charge

$C$

inner shell $C$

outer shell $C$