Just as its names suggest, a bar magnet refers to a magnet with a bar shape and magnetic poles at both ends. If you hang the midpoint of the bar magnet with a thin line, when it is still, its ends will point to the south and north of the earth. The end that points to the north is called the north or N pole, and the end that points to the south is the south pole or S pole.
The magnetic line of induction of the bar magnet is a closed curve that does not cross and goes out of the N pole of the magnet and back to the S pole. Where the magnetic lines are dense, the magnetic field is strong, and where the magnetic lines are sparse, the magnetic field is weak. Therefore, the strongest part of the bar magnet is located at both ends of the magnet, and there is almost no magnetism in the middle.
Bar magnets are usually made of iron or steel, but can also be made of any ferromagnetic substance or ferromagnetic composite material. The magnetism of this type of magnets is almost always permanent, which means it will maintain the magnetic field for a considerable period of time without using current.
Like other magnets, the magnetic field generated by bar magnets can damage electronic devices. When they are placed near hard drives, computer disks, or even videotapes, data stored on magnetic particles may be damaged. If the bar magnet is placed on the side of a speaker or other sound equipment, it will cause the sound to be interrupted or even be permanently damaged. If it is placed on the side of the computer, it may cause the system to be disabled or even make it completely inoperable.
Bar magnets are the most commonly used magnetic teaching aids. They are usually made of iron aluminum carbon or aluminum nickel cobalt and can be painted in red, blue, or other colors. They are usually used in physics teachings, such as with small magnetic needles or iron filings to show the magnetic field, and can also be used to attract light iron parts, such as pins. Stanford Magnets can provide high-quality, different specifications and colors of bar magnet products according to customer requirements.
Thank you for reading our article and we hope it can help you to have a better understanding of what are bar magnets. If you want to learn more about magnets, we would like to advise you to visit Stanford Magnets for more information.
As a leading magnet supplier across the world, Stanford Magnets has been involved in R&D, manufacturing, and sales of magnets since the 1990s. It provides customers with high-quality permanent magnets like SmCo magnets,neodymium magnets, AlNiCo magnets, and ferrite magnets (ceramic magnets) at a very competitive price.