A charge ` q ` is placed at the centre of an imaginary spherical surface. What will be the electric flux due to this charge through any half of the sphere.

Explanation

To solve the problem of finding the electric flux due to a charge `q` placed at the center of an imaginary spherical surface through any half of the sphere, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Gaussian Surface**:
- We have a spherical surface with a charge `q` located at its center. This spherical surface can be treated as a Gaussian surface for applying Gauss's law.

2. **Applying Gauss's Law**:
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