A point charge Q is kept at the centre of a square face of edge length a. Calculate the amount of flux linked with the square face due to electric field of given point charge.

Explanation

To solve the problem of calculating the electric flux linked with a square face due to a point charge Q placed at its center, we can follow these steps:

### Step 1: Understand Electric Flux
Electric flux (Φ) through a surface is defined as the product of the electric field (E) and the area (A) of the surface, taking into account the angle (θ) between the electric field lines and the normal (perpendicular) to the surface:
\[ \Phi = E \cdot A \cdot \cos(\theta) \]

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