JEE Main 2026 — Current Electricity Question with Solution

In a meter bridge experiment to determine the value of unknown resistance, first the resistances $2\Omega$ and $3\Omega$ are connected in the left and right gaps of the bridge and the null point is obtained at a distance $l\mathrm{cm}$ from the left. Now when an unknown resistance $x\Omega$ is connected in parallel to $3\Omega$ resistance, the null point is shifted by 10 cm to the right of wire. The value of unknown resistance $x$ is $\_\_\_\_$ $\Omega$.