About magnets, if you understand it, don t come stupid

Wow, you're so talented. But I can't get on CCTV. The reason is simple...You come to me and buy 10 big ones, you go back and see if you can wrap them.

You still have only one pair of poles when you stick together. You can try gluing the ends of the magnet back. What you're doing is the equivalent of a magnet mold row.

That is, you are quite a complete magnet after gluing. And after you take it apart, you break the magnet and each piece has a pair of poles, and you can't put it together along the original ballast. I thought it was a difficult question.

Bai Xing was excited.

Anyway, positive and negative attract, but the attraction is greater than the repulsion, and the gravitational and repulsive forces exist at the same time.

First of all, we must affirm your spirit of exploration, accidentally discover some phenomena of magnetism, and ask questions, which are the basic qualities of learning scientific knowledge, and hope to continue to work hard, scientists are beckoning to you.

The problem you find is a basic problem of the magnetic phenomenon, on the extreme surface of the two poles of each magnet, there are magnetic field lines from n to s, and there are also such magnetic field lines in the part between the two end faces, but they are sparser than the end faces, because they are spread out along the perimeter of the end face, so they are not as concentrated as the end faces, so their suction (repulsion) is not as great as the end faces. The magnetic field lines are characterized by being a bit elastic like rubber bands, and the magnetic field lines do not cross. The part that can form a magnetic field line path is called a magnetic circuit, the magnetic field lines travel along the magnetic circuit, and the magnetic field lines will encounter resistance when traveling through the magnetic circuit, which is called magnetic resistance, different materials have different magnetic resistance, general ferromagnetic materials, magnetic resistance is the smallest, so you can often see some electromagnets used in electromagnetic equipment, common magnetic permeable materials are iron, cobalt, nickel, other metals such as copper, aluminum, gold, silver, etc. are non-magnetic materials.

Air is also a non-magnetic material. So the magnetic field lines have a lot of resistance in the air. If you forcibly combine two magnetic poles of the same polarity, the repulsion force will create an air gap between them, and the magnetic field lines in the magnetic poles will be "squeezed out" to the outside of the magnet, so there are magnetic field lines around the magnet, so if you use another magnet to get closer, there will be a force phenomenon, but if you are careful, you will find that when you lean the same polarity together, it is repulsive, and the opposite sex is attracting.

This is the basic law of nature.

1. The reason why magnets can produce magnetism is the effect of electromagnetic force.

2. Under the action of the magnetic field generated by the magnet, the arrangement of the atomic magnetic moments of iron will change from chaotic to orderly, so that it will be magnetized and produce a magnetic field. In this way, an electromagnetic force can be generated between the magnet and the iron, so the magnet can attract iron.

3. Magnets can be divided into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or they can be artificially manufactured. Non-permanent magnets, such as electromagnets, only appear magnetic under certain conditions.

The composition of the magnet is iron, cobalt, nickel and other atoms, and the internal structure of the atoms is relatively special, and it itself has a magnetic moment. Magnets are capable of generating magnetic fields and have the property of attracting ferromagnetic materials such as iron, nickel, cobalt, and other metals.

Magnets are divided into permanent magnets and soft magnets, permanent magnets can be natural products, also known as natural magnets, or they can be artificially manufactured, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, and soft magnetism is to add electricity, which is also a method of adding magnetic force, such as electromagnets, and other electric currents will slowly lose magnetism when removing soft iron.

If you think of the Earth as a large magnet, the Earth's magnetic north pole is the guide pole, and the geomagnetic south pole is the north pole. Between magnets and magnets, the poles of the same name repel each other, and the poles of the same name attract each other. So, the compass repels from the South Pole, the north arrow repels from the North Pole, and the compass attracts the north arrow.

A magnet is an object that can generate a magnetic field and remain magnetic for a long time. It is usually made of iron, nickel, cobalt, and its alloys. Magnets can be divided into two types: strong magnets and weak magnet means rock masses.

Strong magnets have strong magnetic burners and can be used in the manufacture of motors, generators, sound equipment, computer storage media, etc. Strong magnets can be manufactured in a variety of ways, for example, steel or ferroalloys can be exposed to a strong magnetic field, or batteries or electric currents can be used to strengthen the magnetic field.

In contrast, weak magnets have weak magnetism and are mainly used to make small devices such as magnetic buckles and bookmarks. Weak magnets are usually manufactured by mixing materials such as iron, nickel, and cobalt with other materials to make magnetic materials.

In addition to being used in practical applications, magnets are also widely used in science and education. Through the placement of iron filings on magnets, laboratory demonstrations, and basic experiments on magnetic fields and electromagnetics, we can better understand magnetic fields, electromagnetic phenomena, physics, chemistry and other disciplines.

Matter is mostly made up of molecules, which are made up of atoms, which in turn are made up of nuclei and electrons. Inside the atom, the electrons rotate incessantly and revolve around the nucleus. Both of these motions of electrons produce magnetism.

But in most matter, the direction of electron movement is varied and chaotic, and magnetic effects cancel each other out. Therefore, most substances are not magnetic under normal conditions.

Ferromagnetic substances such as iron, cobalt, nickel or ferrite are different, and the electron spins inside them can be spontaneously arranged in a small area to form a spontaneous magnetization region, which is called a magnetic domain. After the ferromagnetic material is magnetized, the internal magnetic domains are arranged neatly and in the same direction, so that the magnetism is strengthened, and the magnet is formed. The magnet magnetizes the magnet, and the magnetized iron and the magnet have different polarities of attraction, and the iron is firmly "glued" to the magnet.

The natural magnet is ferric tetroxide.

Whereas, artificial magnets are usually steel.

Steel retains its magnetism after it has been magnetized.

The reason why magnets should be called magnets:

1. According to the name of the most components contained in the magnet, the magnet is the popular name of the people, and the magnet is a kind of magnetic ore, which contains a large amount of iron;

2. According to its ** name The initial magnet obtained was a thing called 4 iron oxide 3, because iron was easily picked up and permanently magnetized, and later a large number of magnetic iron products appeared;

3. According to its internal atom naming, the composition of the magnet is iron, cobalt, nickel and other atoms, and the internal structure of its atoms is relatively special, and it itself has a magnetic moment. Chun Chun and.

Magnetic pin iron is not iron, it is a substance that can generate a magnetic field. Magnets are usually made of metallic elements such as iron, nickel, and cobalt, which can form magnetism under certain conditions, and will be magnetized under the action of an external magnetic field. The magnetization of magnets can make them adsorb magnetic substances such as iron, nickel, and cobalt, so they are often used in the manufacture of electromagnetic equipment such as motors, generators, and electromagnets.