Q.
In the given figure two tiny conducting balls of identical mass $m$ and identical charge $q$ hang from non-conducting threads of equal length $L.$ Assume that $\theta$ is so small that $\tan\theta \approx \sin\theta,$ then for equilibrium $x$ is equal to
A) $\left( \frac{q^{2}L}{2\pi\varepsilon_{0}mg} \right)^{\frac{1}{3}}$
B) $\left( \frac{qL^{2}}{2\pi\varepsilon_{0}mg} \right)^{\frac{1}{3}}$
C) $\left( \frac{q^{2}L^{2}}{4\pi\varepsilon_{0}mg} \right)^{\frac{1}{3}}$