In a cuboid of dimension 2 L × 2 L × L , a charge q is placed at the centre of the surface S having area of 4 L 2 . The flux through the opposite surface to S is given by

Question

In a cuboid of dimension 2 L × 2 L × L , a charge q is placed at the centre of the surface S having area of 4 L 2 . The flux through the opposite surface to S is given by, q 12 ∈ 0, q 3 ∈ 0, q 2 ∈ 0, q 6 ∈ 0

MARKS App · Accepted Answer

Assume a similar cuboid on top of the given cuboid to make symmetry about charge. Thus, it becomes a cube of length 2 L . Flux passing through whole cube is ϕ = q ∈ 0 (Gauss's Law). Since, total faces are 6 , so flux passing through shaded face = q 6 ∈ 0 .

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