Mean radius of a toroid carrying current of 2A is `30//pi` cm. Total number of turns in toroid is 600. A paramagnetic substance is used to prepare a ring to make the core of toroid and its temperature is kept at 300K. If intensity of magnetization in the core is `6.0 xx 10^(-2)`A/m. find the magnetic susceptibility of the material at 300K. How the intensity of magnetization will change when temperature of core is changed to 450K?

Explanation

To solve the problem step by step, we will follow the outlined approach in the video transcript.

### Step 1: Calculate the Number of Turns per Unit Length (n)
Given:
- Total number of turns, \( N = 600 \)
- Mean radius of the toroid, \( R = \frac{30}{\pi} \) cm = \( \frac{30}{\pi} \times \frac{1}{100} \) m = \( \frac{0.3}{\pi} \) m

The length of the toroid (circumference) is given by:
...