What is the relation between dielectric constant and electric suseptibillity ?

Explanation

To find the relation between the dielectric constant (k) and electric susceptibility (χ), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Polarization**:
- In a dielectric medium, polarization (P) occurs due to an external electric field (E). For linear dielectrics, the polarization is directly proportional to the electric field.
- The relationship is given by:
\[
...