# Dipole in a magnetic field

## Homework Statement

A magnetic dipole m = -m0^z is situated at the origin, in an otherwise uniform magnetic
eld B = B0^z. Show that there exists a spherical surface, centered at the origin, through
which no magnetic eld lines pass. Find the radius of this sphere, and sketch the eld lines,
inside and out.

## The Attempt at a Solution

I have no idea how to approach this question. please dont solve it for me, but if you could point me in the right direction to try and solve this i would be grateful.

## Answers and Replies

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## Homework Statement

A magnetic dipole m = -m0^z is situated at the origin, in an otherwise uniform magnetic
eld B = B0^z. Show that there exists a spherical surface, centered at the origin, through
which no magnetic eld lines pass. Find the radius of this sphere, and sketch the eld lines,
inside and out.

## The Attempt at a Solution

I have no idea how to approach this question. please dont solve it for me, but if you could point me in the right direction to try and solve this i would be grateful.

You might start by finding the total magnetic field (what is the field of aa magnetic dipole) and the finding where it is zero