The magnetic field at a point on equator is 0.3 G. Find the magnetic moment of the assumed dipole at the Earth's centre. Take, radius of Earth = 6,400 km.

Explanation

To solve the problem of finding the magnetic moment of the assumed dipole at the Earth's center given the magnetic field at the equator, we can follow these steps:

### Step 1: Convert the Magnetic Field
The magnetic field \( B \) is given as \( 0.3 \, \text{G} \). We need to convert this value from Gauss to Tesla since the standard unit for magnetic field in SI is Tesla.

\[ B = 0.3 \, \text{G} = 0.3 \times 10^{-4} \, \text{T} = 3.0 \times 10^{-5} \, \text{T} \]
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