Two charges \(q\) and \(-3q\) are placed fixed on \(x\)-axis separated by distance \(d.\) Where should a third charge \(2q\) be placed such that it will not experience any force?
| 1. | At a distance \(\dfrac{d}{\sqrt3 -2}\) to the left of charge \(q\) |
| 2. | At a distance \(\dfrac{d(\sqrt3 +1)}2\) to the left of charge \(q\) |
| 3. | At a distance \(\dfrac{d}{2}\) to the right of charge \(-3q\) |
| 4. | Midway between \(q\) and \(-3q\) |
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