The application of (1) magnet in medicine. In medicine, magnetic resonance imaging can be used to diagnose abnormal tissues of human body and judge diseases, which is the well-known magnetic resonance imaging technology. Magnets were used blindly in ancient medicine in China. People use the magnetic differences of different components in blood to separate red blood cells from white blood cells. In addition, the interaction between magnetic field and human meridians can realize magnetotherapy, which has a unique role in treating many diseases and has been applied to magnetic therapy pillows, magnetic therapy belts and so on.

(2) Magnetic applications in astronomy and other fields. Many mineral resources are * * *, which means that several minerals are mixed together and have different magnetic properties. Using this feature, people developed a magnetic separator. Minerals with different components have different magnetic properties, and the magnetic strength is different. These substances are attracted by magnets, so the attraction is different. Therefore, mixed minerals with different magnetism can be separated to realize magnetic beneficiation.

(3) Application in traditional industries. For example, electrification is impossible without magnetic materials, because power generation requires generators, power transmission requires transformers, motors require motors, and telephones, radios and televisions require speakers. Magnetic steel coil structure is used in many instruments. These have been mentioned in other contents.