$$\begin{gathered} If E=\frac{qx}{(a^2+x^2{)}^{\raisebox{1ex}{$3$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}} represents the electric field on the axis of the uniformly charged ring of radius \text{'}a\text{'}, then value of E is maximum for what value of X on the axis from the centre of the ring? \\ \left(1\right) x=\pm \frac{a}{\sqrt{2}} \\ \left(2\right) x=\pm a \\ \left(3\right) x=\pm \frac{a}{2} \\ \left(4\right) x=\pm \frac{a}{2\sqrt{2}} \end{gathered}$$