Static magnetic field

1. Similar to electrical conduction, the normal component of the magnetic flux (B) on the dielectric interface is continuous. And because there is no magnetic monopole, the normal component of the interface has no discontinuity.

2. The tangential component of the magnetic field strength h on the dielectric interface is continuous in most cases: as long as it is not a superconductor or ideal conductor, there is no surface current density, only the body current density.

3. From the above can be launched, if two adjacent media, respectively, air and ferromagnetic materials, then in most cases:

If the magnetic flux line from the air into the ferromagnetic medium, unless the angle of incidence in the air is close to 0, the magnetic flux line in the ferromagnetic medium is almost parallel to the interface;

If the magnetic flux line enters the air from the ferromagnetic medium, the magnetic flux line in the air is almost perpendicular to the medium.

Static magnetic field