Physics - Electrostatics Question with Solution | TestHub

Three concentric conducting spherical shells have radii $\mathrm{r},2\mathrm{r}$ and 3 r respectively. In the state shown, charges ${\mathrm{q}}_1,{\mathrm{q}}_2$ and ${\mathrm{q}}_3$ are present on innermost, middle and outermost shells, respectively. Then select correct alternative(s).