A solenoid has a core of a material with relative permeability `400`. The windings of the solenoid are insulated from the core and carry a current of `2A`. If the number of turns is `1000` per metre, calculate (i) H (ii) B (iii) Intensity of magnetisation I, and the magnetising current.

Explanation

To solve the problem step by step, we will calculate the magnetic intensity \( H \), magnetic induction \( B \), intensity of magnetization \( I \), and the magnetizing current \( I_m \).

### Step 1: Calculate Magnetic Intensity \( H \)

The formula for magnetic intensity \( H \) in a solenoid is given by:

\[
H = n \cdot I
...