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The magnets we usually see can attract substances such as iron, nickel, and cobalt through the air. So everyone will be curious, what is the meson that transmits magnetic force?The essence of magnetic force is also an electromagnetic phenomenon and cannot act in isolation. We know that electrons surround the atomic nucleus, which can spin and are also distributed outside the nucleus through the formation of electron clouds. The spin of electrons can generate spin magnetic moments, and the motion of electrons outside the atomic nucleus can also generate orbital magnetic moments.The sum of these two magnetic moments will make the atoms appear magnetic. The spin direction and orbit of electrons determine the direction of magnetic moments.However, in most objects in life, the electrons outside the atomic nucleus are paired, with one electron spinning down and the other up, so the spin magnetic moment can be offset. Even if there are unpaired electrons, such as atoms arranged in disorder, the magnetic moment generated by unpaired electrons will be offset at the micro scale, so they will n: 28

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Properties of Magnets 1. A magnet has magnetism, which is its most obvious characteristic.The Application of Neodymium Iron Boron Magnets in Speakers2. A magnet can attract iron nails in a magnetic field because its molecular arrangement is opposite to the direction of current flow.When a wire passes through the center (or poles) of a magnet, an induced electromotive force is generated.When two mutually repelling objects come close to a certain extent, relative motion occurs between them.5. The compass can be used to determine direction and distance. The working principle of a compass is to deflect the pointer based on the force of the geomagnetic field on the current6. An alternating electromagnetic field is generated in an energized solenoid, which can cut and vibrate metal to produce sound. (Electromagnetism phenomenon: The phenomenon of a changing magnetic field around a conductor that causes a voltage difference between the two ends of the conductor due to the action of Lorentz force.)7. The Earth is a: 24

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What types of magnets are there? Firstly, a definition. A magnet is a solid object that attracts iron. Magnets achieve this through a phenomenon called magnetism, in which the forces they generate extend into the field (i.e., the area around the magnet).Magnets may have the ability to perform this function naturally, such as magnets, or they may acquire this ability when combined with other elements such as neodymium, iron, and boron.How many types of magnets are there?Magnets can be roughly divided into three types: temporary magnets, permanent magnets, and electromagnets.Magnets are classified according to their magnetic source.1、 Temporary magnetThe screwdriver can temporarily magnetizeTemporary magnets will be magnetized in the presence of a magnetic field. When the magnetic field is removed, they gradually lose their magnetism. Some irons and ferroalloys, as well as paper clips and nails, act as temporary magnets.2、 Permanent magnetPermanent magnets do not easily lose their magnetism. These magnets may be natural: 24

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What is the principle of magnetite In fact, the magnet in people's mouths is not a stone itself, nor is it pure iron. In ancient times, the natural magnets used by people to manufacture compasses were mostly composed of iron oxide, iron oxide, and many other impurities. In fact, besides iron, magnetite can also attract metals such as nickel and cobalt, but these two metals are too rare in daily life. For a long time, people only knew that it can absorb iron, so they directly named it magnetite and continue to use it today.At that time, people were not sure why magnets generated magnetic force, and even regarded magnetic force as a divine force. With the development of science, especially the discovery of the law of electromagnetic induction, people finally discovered the mystery of magnetic force generated by magnets.According to Ampere's law, a magnetic field is generated near the current, and the strength of the magnetic field changes with the current. The greater the current, the stronger the magnetic field.: 23

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7 tips you need to know about powerful magnets 1. What are the types of magnets?Classified by attributes: neodymium iron boron magnets (strong magnets), ferrite magnets, samarium cobalt magnets, aluminum nickel cobalt magnets, and iron chromium cobalt magnets.Classified by shape: circular magnet, square magnet, tile magnet, irregular magnet, cylindrical magnet, etc.2. Which type of magnet has the best magnetic properties?The answer is neodymium iron boron strong magnets, which belong to the third generation rare earth permanent magnets and are also known as strong magnets or magnetic kings. Its magnetic performance is much higher than that of ferrite, aluminum nickel cobalt, and samarium cobalt magnets, making it the most cost-effective magnet to date.3. Maximum operating temperature of magnets made of different materialsThe maximum operating temperature of different magnets varies. Generally speaking, the maximum operating temperature of a magnet refers to the irreversible loss of permanent magnet magnetism beyond this temperature: 23

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Magnet restoration of magnetism: methods and applications The weakening of magnet magnetism may be caused by various reasons, such as long-term use, high temperature, magnetic field interference, etc. The method of restoring magnetism depends on the type The weakening of magnet magnetism may be caused by various reasons, such as long-term use, high temperature, magnetic field interference, etc. The method of restoring magnetism depends on the type and specific situation of the magnet. Here are some common methods for reference:High temperature heat treatment: Heat the magnet to a temperature above its Curie point, and then slowly cool it. This process can help rearrange the magnetic particles inside the magnet, thereby enhancing its magnetism. Please note that different types of magnets have different Curie points, so before conducting high-temperature heat treatment, please ensure that you understand the characteristics and applicable temperature range of the magnet.Magnetic field magnetization: Place a magnet in a strong magnetic field, such as another strong magnet or electromagnet. By interacting with a strong magnetic field, the magnetic particles inside the magnet rearrange, thereby enhancing its magnetism. This process needs to: 21

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