The composition of a magnet is atoms such as iron, cobalt, nickel, etc. The internal structure of the atom is relatively special, and it has a magnetic moment itself. Magnets can generate magnetic fields and have the property of attracting ferromagnetic substances such as iron, nickel, and cobalt.

Magnet type: shape magnets: square magnets, tile magnets, special-shaped magnets, cylindrical magnets, ring magnets, wafer magnets, magnetic rod magnets, magnetic frame magnets, attribute magnets: samarium cobalt magnets, neodymium iron boron magnets ( Powerful magnets), ferrite magnets, aluminum-nickel-cobalt magnets, iron-chromium-cobalt magnets, industrial magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, and more. The magnet is divided into a permanent magnet and a soft magnet. The permanent magnet is added with strong magnetism, so that the spin of the magnetic substance and the angular momentum of the electrons are arranged in a fixed direction, and the soft magnet is charged with electricity. (It is also a method of adding magnetic force.) When the current is removed, the soft iron will slowly lose its magnetism.

Hang the midpoint of the bar magnet with a thin line. When it is stationary, its two ends will point to the south and north of the earth. pole.

If the earth is imagined as a large magnet, the geomagnetic north pole of the earth is the guide pole, and the geomagnetic south pole is the north pole. Between magnets, magnetic poles of the same name are repelled and magnetic poles of different names are attracted. Therefore, the compass is repelled from the South Pole, the north compass is repelled from the North Pole, and the compass and the North compass are attracted.

Magnets can be divided into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or they can be manufactured by man. Non-permanent magnets, such as electromagnets, are magnetic only under certain conditions.