- Homework Statement
- Find B in the z-drection
- Homework Equations
- B = (u/4pi)((3z(z.m)-m)/(|z|^3))
I thought I could replace r^ with z^ and |r|=z since it's only in the z-direction. Is it okay for me to do that?
Also, do I need to consider the magnetic dipole moment, m, only in the z-direction as well? Or can I just keep it as m?
So assuming that I can replace r^ with z^ and keep m as just m. My answer is
Bz(r) = (mu * m) / (2 * pi * (z^3)).
Is this correct? Can I say ^r*^r=1?