What is the susceptibility and permeability of a perfectly diamagnetic substance?

Explanation

To find the susceptibility and permeability of a perfectly diamagnetic substance, we can follow these steps:

### Step 1: Understanding Magnetic Susceptibility
Magnetic susceptibility (χm) is defined as the ratio of the intensity of magnetization (I) to the magnetizing field intensity (H). The formula is given by:
\[ \chi_m = \frac{I}{H} \]

...