Why does a magnet have magnetism?

We have all played with magnets as children and know that magnets can attract metal objects, so do you know why magnets are magnetic? Xiaobian next for you to explain. Magnets are made of iron, cobalt, nickel, and other atoms because of their insides. The structure is more special, itself has this move. And the magnet can produce a magnetic field, because one end of the magnet is the North Pole, one end of the South Pole, has attracted ferromagnetic material. And there are many objects in nature without magnetism, because the magnetic material in iron, nickel, cobalt is different, their internal electrons can spontaneously rehearse in the same direction, so that the magnetic strengthening, the formation of magnets. The process by which a magnet attracts iron is also caused by an attraction to the iron, when the magnet sticks firmly to the iron. It is what we call a magnet that has a magnetic force. This is why a magnet can attract iron but not aluminum, copper and other objects. The internal structure of different metals is different. The unit of induction strength is Tesla, short for special or T. Magnets can also be subdivided into permanent magnets and non-permanent magnets. Permanent magnets are natural products that retain magnetism for a long time and do not make the magnetic force disappear. Permanent magnets require certain conditions to appear, magnets our ancestors in 5000 years ago natural magnet stone!

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