A point charge Q is placed at the corner of a square of side a. Find the flux through the square.

Explanation

To find the electric flux through a square surface when a point charge \( Q \) is placed at one of its corners, we can follow these steps:

### Step 1: Understand the Concept of Electric Flux
Electric flux (\( \Phi \)) through a surface is defined as the number of electric field lines passing through that surface. Mathematically, it is given by the integral:
\[ \Phi = \int \mathbf{E} \cdot d\mathbf{S} \]
where \( \mathbf{E} \) is the electric field and \( d\mathbf{S} \) is the differential area vector of the surface.
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