In our country, the phenomenon of magnetism and the use of magnets began to be discovered. As early as 2000 years ago, such boats first discovered that hematite has the characteristics of attracting iron. Magnetic iron is divided into two types: magnetic iron and artificial magnetic iron. Magnetic iron is a collided mineral field, and its composition is air-oxidized tri-iron.
In our country, the phenomenon of magnetism and the use of magnets began to be discovered. As early as 2000 years ago, such boats first discovered that hematite has the characteristics of attracting iron. Magnetic iron is divided into two types: magnetic iron and artificial magnetic iron. Magnetic iron is a collided mineral field, and its composition is air-oxidized tri-iron. The collision of artificial magnetic iron is much stronger than that of magnetic iron. The permanent magnetic irons used in the industrial chain are all artificial magnetic irons. The magnetic irons are used very little. The human magnetic iron is also divided into a long-term magnetic iron and a temporary magnetic iron. Some of the magnetic irons that magnet manufacturers usually refer to refer to permanent magnets.
There are two magnetic irons, one is Nanzhou (8) and the other is North Circle (N). The magnetism of the magnetic iron is concentrated in two aspects. If you put a bar magnet in the suspension, when it is finished, it will always have one cat facing there and the other end facing north. The Raiders Daquan Needle is such a small magnetic needle. Not only is the magnetic iron likely to attract iron pins or other iron-magnetic chemicals that come into contact with it, but it also harms the iron in its surrounding area. For example, if the guide needle faces the magnetic iron, the guide needle will deflect immediately. Within a certain range of the magnetic field, all iron magnets need to be harmed by the magnetic force of the magnetic iron. In this way, the hazard range of magnetic iron is called magnetic field.
Magnetic field is a special state of existence of chemical substances in the world, and it has specificity. Everything that is placed in the magnetic field will be affected by the magnetic field, which means that the magnetic field is indifferent. In order to better facilitate the analysis, the magnetic field is generally drawn with many imaginary vertebrae, which can be called magnetic zygomatic. The relationship between magnetism and electricity has many similar characteristics. For example, the relationship between the magnetic field of magnetite and its optical rotation conflict with each other, while the heterooptical rotation attracts each other. The characteristics of friend oranges are similar.
If a straight conductor is passed over a piece of cardboard with iron powder spread evenly, when there is no current in the conductor, the fans are in chaos and disorder. After the current is applied, the iron powder will be arranged in a regular circle, and the N guide Aquilegia will be placed on the ground layer by layer. This ring means the magnetic square that we use to trace the magnetic field. The rules of the clappers are like the wave phase that needs to be caused when the capital of the buffalo is invested in the boulders. The center is thinner. This shows that the magnetic field is stronger near the guide, and the longer the guide is, the weaker the magnetic field is. In this experiment, it is also possible to find that the greater the amount of current in the conductor, the stronger the magnetic field. This is also similar to when stone funds are invested in still water. The larger the stone, the higher the stormy water.