Question

A point charge q is placed at a distance a/2 directly above the centre of a square of side a. The electric flux through the square is ______.

Options

• q/ε₀

• q/πε₀

• q/4ε₀

• q/6ε₀

Answer 1

A point charge q is placed at a distance a/2 directly above the centre of a square of side a. The electric flux through the square is q/6ε₀.

Explanation:

An imaginary cube can be made by considering charge q at the centre and given square is one of its face. So flux through the given square (i.e. one face).

Φ = q/6ε₀