**Question:**

Two charges, each equal to $\mathrm{q}$, are kept at $\mathrm{x}=-\mathrm{a}$ and $\mathrm{x}=\mathrm{a}$ on the $x$-axis. A particle of mass $m$ and charge $q_{0}=\frac{q}{2}$ is placed at the origin. If charge $\mathrm{q}_{0}$ is given a small displacement $(y<<a)$ along the $y$-axis, the net force acting on the particle is proportional to

Correct Option: 1

**Solution:**

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