There are so many kinds of magnets, so many specifications and shapes, so many colors, and so many types. The formal introduction to magnets begins below.
Introduction to magnets:
A magnet is an object that can generate a magnetic field. It is a magnetic dipole and can attract ferromagnetic materials such as iron, nickel, cobalt and other metals. The collision pole is determined by hanging a magnet with a thin wire. The magnetic pole pointing north is called the north pole or N pole, and the collision pointing south is called the south pole or S pole. (If you think of the earth as a big magnet, the current magnetic north pole of the earth is the S pole, and the earth's magnetic north pole is the south pole.) When iron is touched, different poles attract each other, and like poles repel. The south pole and the north pole attract each other, the south pole and the south pole repel, and the north pole and the north pole repel.
Magnets are actually everywhere in our lives. They are found in TVs, computers and other household appliances at home, and in cars, airplanes, electric cars, etc. For example, magnets are present in the handsets we usually use. When the two earpieces are close together, you will find that the two earpieces will not stick together. This is because the two magnets inside the earphones have the same magnetic pole, which is what we mean by same-sex repulsion.
Why are magnets magnetic?
This is because the molecules in magnets are different from other steel materials. The magnet itself has magnetic molecules such as nickel and cobalt, which can form magnetic domains under certain conditions, while other materials do not have magnetic molecules. This is the characteristic of magnets.