Two equal positive point charges are separated by a distance 2 a. The distance of a point from the centre of the line joining two charges on the…

Two equal positive point charges are separated by a distance $\displaystyle 2 a$. The distance of a point from the centre of the line joining two charges on the equatorial line (perpendicular bisector) at which force experienced by a test charge $\displaystyle \mathrm{q}_0$ becomes maximum is $\displaystyle \frac{a}{\sqrt{x}}$. The value of $\displaystyle x$ is $\displaystyle \_\_\_\_$.