A bar magnet 20 cm in length has a magnetic moment of `1 Am^2` . Calculate the magnetic field at a distance:
(i) 0.5 m from its centre at a point on its axial line
(ii) 0.6 m from its centre at a point on its equatorial line

Explanation

To solve the problem, we will calculate the magnetic field at two different points due to a bar magnet with a given magnetic moment and length.

### Given Data:
- Length of the bar magnet, \( 2L = 20 \, \text{cm} = 0.2 \, \text{m} \)
- Magnetic moment, \( m = 1 \, \text{Am}^2 \)
- Distance for part (i), \( r_1 = 0.5 \, \text{m} \) (on the axial line)
- Distance for part (ii), \( r_2 = 0.6 \, \text{m} \) (on the equatorial line)

...