When telling the magnetic source, electromagnetic induction, and magnetic device of magnetic materials, we have mentioned the actual application of some magnetic materials electromagnetic. In fact, magnetic materials have been widely used in all aspects of traditional industries.

For example, if there is no magnetic material, electrification becomes impossible, because generators and transformers are used for power generation, transformers, and power machinery must be used to use motor, telephone, radio and TV. Many instruments need to be a magnetic steel coil structure. These have been mentioned when talking about other content.

China has been recorded in the aurora since ancient times. Northern light is actually the result of the interaction between particles and geomagnetic fields in the solar wind. The solar wind is a high -energy charged particle flow from the sun. When they reach the earth, they interact with the geomagnetic field, as if the wire with a current is stressed in the magnetic field, making these particles move and gather north and south poles, and collide with the thin gas of the earth. As a result, the gas makes the gas The molecules are stimulated and shirk.

Sun sunspot is a very intense area of the sun's magnetic field activity. The outbreak of the sun sunspots affects our lives, such as temporarily interrupted radio communication. Therefore, studying the sun sunspots is of great significance to us.

Geomagnetic changes can be used to explorate the mining bed. Because all substances have strong or weak magnetic properties, if they gather together to form a mine, they will inevitably interfere with the geomagnetic field in the nearby area, causing abnormalities in the geomagnetic field. Based on this, you can measure the magnetic map of the ground in land, ocean or air, obtain the magnetic map, and analyze and further exploration of the areas with abnormal magnetic fields on the ground magnetic map. Often, unknown minerals or special geological structures can be found. Different geological rocks often have different magnetic properties. Therefore, it can be judged to judge the changes in the geological age according to the magnetic assistance of the rock and the changes in crust.

Many mineral resources are symbiotic, which means that several minerals are mixed together, and they have different magnetic properties. Using this feature, people have developed a magnetic selection machine to use the different magnetic and magnetic and weakness of the minerals with different ingredients to attract these substances with magnets, then they are attractive. Different magnetic minerals are separated to achieve magnetic minerals.