Magnet - Wikipedia
A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets.
Magnetism - Wikipedia
Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism.
Magnetism | Definition, Examples, Physics, & Facts | Britannica
2024年11月14日 · Magnetism, phenomenon associated with magnetic fields, which arise from the motion of electric charges. It can be an electric current in a conductor or charged particles moving through space, or it can be the motion of an electron in an atomic orbital. Learn more about magnetism in this article.
Magnets and Electromagnets - PhET Interactive Simulations
Explore the interactions between a compass and bar magnet. Discover how you can use a battery and coil to make an electromagnet. Explore the ways to change the magnetic field, and measure its direction and magnitude around the magnet.
Magnetism – The Physics Hypertextbook
Hard magnetic materials require relatively strong magnetic fields to become permanently magnetized and to reverse or erase the magnetization. They are most appropriate for digital data storage; Soft magnetic media require relatively weak magnetic fields to become magnetized. They are more appropriate for analog audio and video recording.
Magnet | Physics, Properties & Uses | Britannica
2024年12月5日 · Magnet, any material capable of attracting iron and producing a magnetic field outside itself. By the end of the 19th century all the known elements and many compounds had been tested for magnetism, and all were found to have some magnetic property.
Magnets exert forces on each other just like charges. You can draw magnetic field lines just like you drew electric field lines. Magnetic north and south pole’s behavior is not unlike electric charges. For magnets, like poles repel and opposite poles attract. A permanent magnet will attract a metal like iron with either the north or south pole.
21.1: Magnetism and Magnetic Fields - Physics LibreTexts
A magnetic field is generated by a feedback loop: Current loops generate magnetic fields (Ampère’s law); a changing magnetic field generates an electric field (Faraday’s law); and the electric and magnetic fields exert a force on the charges that …
22: Magnetism - Physics LibreTexts
Magnetism is a subject that includes the properties of magnets, the effect of the magnetic force on moving charges and currents, and the creation of magnetic fields by currents. There are two types of magnetic poles, called the north magnetic pole and south magnetic pole.
22.1: Magnets - Physics LibreTexts
Magnetism is a subject that includes the properties of magnets, the effect of the magnetic force on moving charges and currents, and the creation of magnetic fields by currents. There are two types of magnetic poles, called the north magnetic pole and south magnetic pole.
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