Q 12-01-047JEE MainJEE Main 2024 (4 Apr, Shift 2)Easy
A charge $q$ is placed at the centre of one of the surfaces of a cube. The flux linked with the cube is
Answer: (A) $\dfrac{q}{2\varepsilon_0}$
Place an identical cube on the other side of that face: the two cubes together enclose $q$, so the total flux is $\dfrac{q}{\varepsilon_0}$. By symmetry each cube gets half: $\dfrac{q}{2\varepsilon_0}$.
Solution by Sreeraj P, M.Sc Physics