A bar magnet is `0.10` m long and its pole strength is 120 Am . Find magnitude of magnetic field at a point on its axis at a distance 20 cm from it .

Explanation

To find the magnitude of the magnetic field at a point on the axis of a bar magnet, we can use the formula for magnetic induction along the axial line of a bar magnet:

\[ B = \frac{\mu_0}{4\pi} \cdot \frac{2M \cdot d}{d^2 - L^2} \]

where:
- \(B\) is the magnetic field,
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