Question

Write the expression for magnetic field intensity at a point on the axial position due to a magnetic dipole. Explain the meaning of the letters used.

Answer 1

In the below expression, $B_{axis}$ is the field intensity along the axis.

${\mu }_0$ is the magnetic permeability of vacuum.

$M$ is the magnetic dipole moment.

$r$ is the distance between the centre of the dipole and the given point.

And $l$ is the ditance between the centre and one of the poles.

$B_{axis}=\frac{{\mu }_0}{4\pi }\times \frac{2Mr}{(r^2-l^2{)}^2}$

This is the expression for magnetic field intensity at a point on the axial position due to a magnetic dipole.