What is electric susceptibility ?

Explanation

### Step-by-Step Solution:

1. **Definition of Electric Susceptibility**: Electric susceptibility, denoted as \( \chi \), is a measure of how much a dielectric material becomes polarized when subjected to an electric field.

2. **Understanding Polarization**: When a dielectric material is placed in an electric field, it experiences polarization. This polarization is the alignment of electric dipoles within the material in response to the electric field.

3. **Proportional Relationship**: The polarization \( P \) in the dielectric is directly proportional to the electric field intensity \( E \). This relationship can be expressed mathematically as:
\[
...