QUESTION $4$

A point charge $Q_1=-1$ nC is located at the origin of a Cartesian coordinate system. The charge is enclosed by a surface $S$ with its center at the origin of the same system. Find the Electric Flux Density on the surface $S,$ if the surface is a sphere of radius $2$ m $.$

$\frac{-1}{16}$hat$(r)nC{l}^{m2}$

$16nC{l}^{m2}$

$\frac{1}{16}$hat$(rnCl{)}^{m2}$

$-16nC{l}^{m2}$