magnetic

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A magnet is any material or object that generates a magnetic field. This magnetic field is responsible for the properties of the magnet, that is, pulling other ferromagnetic materials and attracting or repelling other magnets. A permanent magnet is an object made of magnetized material and creates its own permanent magnetic field. Material that can be magnetized is strongly attracted to the magnet and is called ferromagnetism. Although the only magnets that are strongly attracted are ferromagnetic materials, they are generally considered to be magnetic, but all other substances react weakly to magnetic fields.

A magnet is a stone that creates a magnetic field. Although the magnetic field is not visible, the most striking aspect of the magnet is the attractiveness of the metal object or the repulsion of other magnets. Magnets are often used for daily household goods such as credit cards, televisions, speakers, motors, compasses. Magnet strength is measured by its magnetic moment. ("Magnetic") Legend about the discovery of magnets. One of the more general things is that an elderly shepherd named Magne appeals to the magnesia shepherd in northern Greece about 4,000 years ago. When he was grazing, the nail of his shoe stuck to the ground where he was on the sheep. The rock can be named after him, or in the area where the stone was found. ("Canadian Museum of Science and Technology")

The magnetic moment of the magnet (also known as the magnetic dipole moment, usually expressed as μ) is a vector characterizing the overall magnetic properties of the magnet. In the case of strip magnets, the direction of the magnetic moment is the direction from the south pole of the magnet to its north pole, the magnitude of which is related to the strength and distance of these poles. In SI units, the magnetic moment is expressed in A · m 2 (ampere × square meter). Magnets generate both their own magnetic and magnetic fields. The magnetic field strength it produces is proportional to the magnitude of its magnetic moment at any given point. Furthermore, when a magnet is placed in an external magnetic field generated by a different light source, it experiences a torque that tends to orient the magnetic moment parallel to the magnetic field. The magnitude of the torque is proportional to the magnetic moment and the external magnetic field