Magnetic field intensity
= Magnetic field intensity
{title2=$\mathbf H$}
The magnetic field intensity is $\mathbf H=\mathbf B/\mu_0-\mathbf M$ and obeys $\nabla\times\mathbf H=\mathbf J_{\rm free}$ in magnetostatics. In a linear isotropic medium, $\mathbf B=\mu\mathbf H$.