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磁铁的力量：它们如何影响我们的生活

磁铁的力量虽然看起来很小，但在我们的生活中起着至关重要的作用。它以一种无声而坚定的方式影响着我们的日常生活和工作。

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Magnet precautions Electromagnet: A device that utilizes the magnetic effect of current to make soft iron (the inner core of the electromagnetic coil, which can be quickly magnetized and demagnetized) magnetic.(1) Insert a soft iron rod into a spiral coil, and when there is current flowing through the coil, the magnetic field inside the coil magnetizes the soft iron rod into a temporary magnet. However, when the current is cut off, the magnetism of the coil and soft iron rod disappears.(2) The magnetic field generated by magnetization of a soft iron rod, combined with the magnetic field inside the original coil, greatly enhances the total magnetic field strength, so the magnetic force of an electromagnet is greater than that of a natural magnet.(3) The higher the current of a spiral coil, the more coils it has, and the stronger the magnetic field of the electromagnet.: 03

2023-07

About Strong Magnets 1. What are the types of magnets?Classification by attributes: neodymium iron boron magnet (strong magnet), ferrite magnet, Samarium–cobalt magnet, aluminum nickel cobalt magnet, iron chromium cobalt magnet.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 properties are far higher than ferrite, aluminum nickel cobalt, Samarium–cobalt magnet, and it is the magnet with the best performance price ratio so far.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. Ferrite permanent magnet 450 ℃, neodymium iron boron 310 ℃, samarium cobalt 750 ℃, aluminum nickel cobalt 850: 27

2023-06

Physical properties of magnets 1. A magnet has magnetism, which is its most obvious characteristic.2. 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. (Working principle of compass: deflect the pointer according to the force of Earth's magnetic field on the current.)6. 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 huge natural generator - the Sun is a huge battery.People: 27

2023-06

What are the characteristics of magnets Magnets are common objects in daily life, which have two properties: attraction and repulsion.So do you know what its characteristics are? Below, the editor will introduce to you:1. Magnetism:It is the gravitational action of one substance on another.2. Suction force (attraction, pulling force):When there is a certain distance between two objects that are close to each other, one object is attracted by the other object and approaches it.: 27

2023-06

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 magnetTemporary 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 clip and nails, act as temporary magnets.2、 Permanent magnetPermanent magnets do not easily lose their magnetism. These magnets may be naturally occurring ("rare earth") elements or compounds.Examples of permanent magnets include neodymium iron boron (NdFeB) and ferrite (a ceramic like material made from a mixture of iron oxide and nickel, strontium, or cobalt).3、 ElectromagnetAn electromagnet generates a magnetic field by causing an electric current to flow through a coil with a metal core, creating an energized coil. When the current disappears, the magnetic field also disappears.: 27

2023-06

The three main characteristics of magnets Magnets have the following unique and interesting characteristics:,Magnet attraction: Magnets attract ferromagnetic materials such as iron, nickel, and cobalt.Directionality of the magnet: If the magnet is suspended on a rigid support so that it can rotate freely, the magnet always points in the north-south direction.Two poles of a magnet: A magnet has two poles, with the strongest magnetic field strength. Magnetic poles exist in pairs. No matter how small a magnet is, it is impossible to separate one pole.The same poles always repel each other, but the opposite poles attract each other.The magnetic force (attraction or repulsion) between two objects is inversely proportional to the distance between them. When an object approaches, the suction becomes stronger.: 27

2023-06

Manufacturing process of permanent magnets In the process of manufacturing permanent magnets, it is necessary to first prepare a sand demon in the shape of a magnet, and then heat the raw materials such as Red Valley, sulfur, nickel, iron, aluminum, and titanium to above 1600 degrees Celsius. After melting all the metals into liquid, pour the metal solution into the sand film. As the gas inside the hardened sand film is flammable, use a hammer to open the mold and let air enter the mold to cool the material, allowing the gas to burn out, Wait until it cools down and forms, separating the metal from the sand blocks. At this stage, the cast metal is still a regular iron block and has no magnetism!Next, tie the metal onto the copper tube and insert it into a larger tube. Place the copper tube in the middle position, surrounded by sand and gravel, seal both ends of the tube with concrete, expose the copper tube, heat it in the furnace to 700 degrees Celsius, and then remove it. Fix the high voltage charge current aligned at both en: 27

2023-06

Why Magnets Have Magnetism Magnets are a common thing in daily life. Magnets are used in many electrical equipment, such as loudspeakers for playing music, Maglev, and magnetic resonance in hospitals! A magnet is an object with mutual repulsion and attraction. Do you know why a magnet has magnetism? There are many objects in nature, why don't they have magnetism? Why do magnets have magnetism? How are magnets made? After reading it, you will understand!Magnets are composed of atoms such as iron, cobalt, and nickel due to their internal structure. The structure is quite unique, and it is inherent in this move. The reason why a magnet can generate a magnetic field is that one end of the magnet is the North Pole and the other end is the South Pole, which can attract ferromagnetic materials. However, there are many objects in nature that do not have magnetism because the magnetic substances in iron, nickel, and cobalt are different. The electrons inside them can spontaneously rehearse in the same direction, whic: 27

2023-06

Physical 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: 27

2023-06

Will the magnetism of neodymium iron boron magnets disappear? Will the magnetism of neodymium iron boron magnets disappear? For all magnetic materials, they do not have magnetism at any temperature. Generally, magnetic materials have a critical temperature Tc. Above this temperature, the arrangement of atomic magnetic moments is disordered due to the violent Thermal motion of atoms at high temperature. Below this temperature, the atomic magnetic moments are arranged in order to produce Spontaneous magnetization, and the object becomes ferromagnetic.How can the magnetism of neodymium iron boron magnets disappear? By utilizing this feature, many control components have been developed. For example, the rice cooker we use takes advantage of the Curie temperature of magnetic materials. A neodymium iron boron magnet and a magnetic material with a Curie temperature of 105 degrees are installed at the bottom center of the rice cooker. When the water in the pot dries, the temperature of the food will rise from 100 degrees. When the temperature reaches abo: 27

2023-06

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