Are there any magnetic separation materials?
There is a magnetic field around the magnet, and the distribution of the magnetic field around the magnet of different shapes is different.
The permeability of conducting material is larger than that of air. It is easy to conduct magnetism and can restrain the magnetic field in a certain range. Relative to electricity, the magnetic conductive material is equivalent to the conductor, the air is equivalent to the semiconductor, but if the magnetic material is not enough to bind the magnetic field, the magnetic field will overflow and enter into the air.
If the magnetic field is limited to the set area, the magnetic material must be used to bind it.
