A magnet is an object that can produce a magnetic field. It is a magnetic dipole, which can attract ferromagnetic substances such as iron, nickel, cobalt and other metals. The magnetic pole is determined by hanging a magnet with a thin wire. The magnetic pole pointing north is called North Pole or N Pole, and the magnetic pole pointing south is called Guiding Pole or S Pole.
Magnet type:
Shape magnets: square magnets, tile magnets, shaped magnets, cylindrical magnets, ring magnets, disc magnets, strip magnets, magnetic frame magnets, attribute magnets: samarium cobalt magnets, neodymium magnets (strong magnets), ferrite magnets, Al-Ni-Co magnets, Fe-Cr-Co magnets, industrial magnets: magnetic elements, motor magnets, rubber magnets, plastic magnets, etc.
Magnets are divided into permanent magnets and soft magnets. Permanent magnets strengthen magnetism, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, while soft magnets are electrified. (It is also a method of magnetizing. ) Soft iron will slowly lose its magnetism after being removed by equal current.