Radii of two spheres forming a spherical condenser are 0.3 and 0.4m. If dielectric constant of medium is 4 and medium is completely filled in between, find the capacity of the condenser..

Question

$\begin{array}{1 1} 5.34 \times 10^{-10}F \\ 4.43 \times 10^{-10}F \\ 4.66 \times 10^{-10}F\\ 1.74 \times 10^{-10}F \end{array}$