What is a bar magnet?
Bar Magnet is a rectangular object that has a magnetic field. It is usually made of iron or steel, but can also be made of any ferromagnetic substance or ferromagnetic composite. This type of magnet is almost always permanent, which means that it retains its magnetic field for a significant time without using the supplied electric current. When it is freely suspended, the magnet straightens so that the end of its North Pole towards the magnetic northern pole of the Earth. It works in exactly the same way as a compass needle that uses or is a magnet. If the magnet has one end painted in red, this end is traditionally the North Pole. They include cobalt, iron and nickel. Some magnets are made of composite materials that combine ferromagnetic materials with other substances such as aluminum, clay or resin. This attraction attracts other ferromagnetic materials to or magnet to the magnet. Can be used to pick up small ferromagnetic items such as screwsAnd metal shavings, as a "magnetic mixing rod" on the laboratory hob and to hold papers and other objects on the sides of the refrigerators, between many other tasks.
Like other magnets, the magnetic field generated by a bar magnet can damage electronic devices. When placing near a hard disk, computer disk or even videotape, it can cause damage to the data stored by magnetic particles on the item. Magnets located on the sides of speakers or other sound devices can cause sound disruption or even permanent damage. One placed on the computer side can result in deactivated, and can even make it completely broken.
Barnets have been used for years to demonstrate magnetic fields and magnetic lines of force. One of the demonstrations is to pour metal shavings (sometimes called submission) on a piece of paper that is suspended above the magnet. By the procedureASU is aligned to the arches that come out of the north and south poles of the magnet. Other demonstrations include an attempt to touch the northern poles of two different weak magnets together to show how the poles repel. Cutting the bar magnet in half creates two magnets, each with the North and South Poles, although excessive force or heat from cutting can demagnetize instead.