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 .
How Magnets Work - HowStuffWorks
2022年9月20日 · Magnets are objects that produce magnetic fields and attract metals like iron, nickel and cobalt. The magnetic field's lines of force exit the magnet from its north pole and enter its south pole. Permanent or hard magnets create their own magnetic field all the time.
How Do Magnets Attract & Repel? - Sciencing
2017年4月24日 · Magnets attract when a north pole is introduced to a south pole. If like poles are introduced, either north to north or south to south, the magnets repel. Permanent magnets can also cause a reaction with nonmagnetic items, such as metals and even some liquids.
7.2: Magnets, Electromagnets and Magnetic Matter
2024年2月22日 · All magnets attract iron, such as that in a refrigerator door. However, magnets may attract or repel other magnets. Experimentation shows that all magnets have two poles. If freely suspended, one pole will point toward the north.
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.
Magnetism - Education | National Geographic Society
2023年10月19日 · Magnetism is the forceexerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom.
What Is Magnetism? Definition, Examples, Facts - ThoughtCo
2019年11月5日 · Magnetism is defined as an attractive and repulsive phenomenon produced by a moving electric charge. The affected region around a moving charge consists of both an electric field and a magnetic field. The most familiar example of magnetism is a bar magnet, which is attracted to a magnetic field and can attract or repel other magnets.
22: Magnetism - Physics LibreTexts
Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Every material is influenced to …
Magnet Basics | K&J Magnetics Blog
How do magnets attract to one another? How do they repel? How can I magnetize a steel screwdriver? In this article we will cover the following topics: 1. Magnet Basics. A permanent magnet is an object that produces a magnetic field around itself. It is this field that enables them to stick to each other and to some types of metal.
Magnets and magnetic materials - BBC Bitesize
Only certain materials, such as iron, feel a magnetic force. attraction When forces pull objects towards each other. The objects attract each other. repulsion When forces push objects away from...