Question

In a cuboid of dimension $2L \times 2L \times L$, a charge q is placed at the center of the surface ‘S’ having area of 4 L2. The flux through the opposite surface to ‘S’ is given by

• A. q/2∈0
• B. q/6∈0
• C. q/12∈0
• D. q/3∈0

Answer 1

Answer: (B)

q/6∈0

Answer 2

If we consider a similar box above this box then it becomes cube of side length 2L
φ through a surface q/6∈0