Electric Flux & Gauss's Law question from JEE Main 2026 (23 Jan, Shift 1)

Answer: (b)

1. Charge at a vertex is shared by 8 cubes: flux $= \frac{2q}{8\varepsilon_0} = \frac{q}{4\varepsilon_0}$.
2. Charge at a face centre is shared by 2 cubes: flux $= \frac{q}{2\varepsilon_0}$.
3. Total $= \frac{q}{4\varepsilon_0} + \frac{q}{2\varepsilon_0} = \frac{3q}{4\varepsilon_0}$, answer (b).