What is magnet, magnet's historical development, production technology and modern application?

The composition of the magnet is iron, cobalt, nickel and other atoms. The internal structure of the atom is very special, and it has magnetic moment itself. Magnet types: shape magnets: square magnet, tile magnet, heteromorphic magnet, cylindrical magnet, circular magnet, circular magnet, magnetic rod magnet, magnetic frame magnet, magnetic magnet, magnetic frame magnet, samarium cobalt magnet, neodymium iron boron magnet, ferrite magnet, aluminum nickel cobalt magnet, ferrochrome cobalt magnet, industry magnet: magnetic components, Motor magnet, rubber magnet, powerful magnet, plastic magnet and so on. Magnets are divided into permanent magnets and soft magnets, and permanent magnets are combined with strong magnets that make the spin of magnetic materials in a fixed direction with the angular momentum of electrons, and the soft magnetism is added to electricity. It is also a way of adding magnetic force. If the current is removed, the soft iron will slowly lose magnetism.




Magnets can produce magnetic fields and attract the properties of ferromagnetic materials such as iron, nickel and cobalt.




The center point of the bar magnet is suspended in a fine line. At rest, the ends of the bar will point to the South and the north of the earth. The north end is called the Arctic or N pole, pointing to the southern end as the guide pole or the S pole.




If we imagine the earth as a large magnet, the earth's magnetic north pole is the south pole, and the magnetic Antarctic refers to the North Pole. The magnet and magnet are mutually exclusive and magnetic poles attract. Therefore, the compass is repelled from the Antarctic, the compass is repelled from the Arctic, and the compass and the compass are attracted.