# Electric flux through a square frame

Suppose a charge $$q= 0.25 \times 10^{-9} \text{ C}$$ is placed at a distance $$a$$, away from a square of side $$a$$, on its axis. Then what is the net flux through the square?

Note: By axis we mean the line perpendicular to the plane of square and passing through the point of intersection of its diagonals.

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