If a giant bar magnet of magnetic moment `8 xx 10^22 Am^2` is placed inside Earth such that Earth's field can be approximated by this magnet, estimate the intensity of magnetization of Earth. Take, radius of Earth = 6,400 km.

Explanation

To solve the problem, we need to find the intensity of magnetization \( I \) of the Earth given the magnetic moment \( M \) of a giant bar magnet and the radius of the Earth.

### Step-by-Step Solution:

1. **Identify Given Data:**
- Magnetic moment \( M = 8 \times 10^{22} \, \text{Am}^2 \)
- Radius of Earth \( R = 6400 \, \text{km} = 6400 \times 10^3 \, \text{m} = 6.4 \times 10^6 \, \text{m} \)

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