Magnets can be divided into several categories according to dif

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    Magnets are composed of atoms such as iron, cobalt, and nickel. The internal structure of the atoms is quite special and they have a magnetic moment. Magnets can generate magnetic fields and have the property of attracting ferromagnetic materials such as iron, nickel, cobalt and other metals.

    Magnet types: shape magnets: square magnets, tile magnets, special-shaped magnets, cylindrical magnets, ring magnets, disc magnets, bar magnets, magnetic frame magnets, attribute magnets: Samarium cobalt magnets, neodymium iron boron magnets Powerful magnets), ferrite magnets, alnico magnets, iron chromium cobalt magnets, industry magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, etc. Magnets are divided into permanent magnets and soft magnets. Permanent magnets are coupled with strong magnetism, so that the spin and electron angular momentum of the magnetic substance are arranged in a fixed direction, while soft magnets are coupled with electricity. (It is also a method of adding magnetic force) When the current is removed, the soft iron will gradually lose its magnetism.

    Hang the midpoint of the bar magnet with a thin line. When it is still, its two ends will point to the south and north of the earth. The end that points to the north is called the north or N pole, and the end that points to the south is the guide pole or S. pole.

    If you think of the earth as a large magnet, the earth’s magnetic north pole is the guide pole, and the geomagnetic south pole is the north pole. Between the magnet and the magnet, the magnetic poles of the same name repel and the magnetic poles of different names are attracted. Therefore, the compass repels the South Pole, the north arrow repels the North Pole, and the compass attracts the north arrow.

    Classification: 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 artificially. Non-permanent magnets, such as electromagnets, only appear magnetized under certain conditions.

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