Capacity of a spherical condenser with spheres of radii ' $a$ ' and ' $b$ ' is\

Question

Professor PC Thomas Classes · Answer

\ $\mathrm{C}=4 \pi \varepsilon_{0} \frac{\varepsilon_{\mathrm{r}} \mathrm{ab}}{\mathrm{b}-\mathrm{a}}$\ $\varepsilon_{\mathrm{r}}=\mathrm{K}$\