The magnetic scalar potential due to a magnetic dipole at a point on its axis situated at a distance of 20cm from its centre is found to be `1.2 xx 10^(-5) T m`. Find the magnetic moment of the dipole.

Explanation

The magnetic potential due to a dipole is
`V = (mu_o)/(4pi) (M costheta)/r^2`
or,
1.2 xx 10^(-5) T m = (10^(-7) (T m)/A)) M/(0.2 m)^2)`
or, `M= 4.8 A m^2`.