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.

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.

Magnet is defined as a material that can produce its own magnetic field. There are three types of magnet: permanent magnet, temporary magnet, and electromagnet. Magnets are used in electric bells and generators.

Just as electric charges have electric fields surrounding them, magnets have magnetic fields that surround them. This page explores the important concept of the magnetic field and how magnetic field lines communicate its strength and direction.

2019年9月5日 · Magnetism is a physical phenomenon by which a substance is attracted or repelled by a magnetic field. The two sources of magnetism are electric current and spin magnetic moments of elementary particles (primarily electrons). A strong magnetic field is produced when the electron magnetic moments of a material are aligned.

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. The most common was the property of diamagnetism,

2010年6月8日 · According to the classical theory, magnetic fields are clouds of energy around magnetic particles that pull in or push away other magnetic objects. But in the quantum mechanics view,...

Magnetism describes the properties of magnetic objects, which are capable of attracting and repelling other magnets. From using a magnet to post artwork and photos on a refrigerator, to navigating with a compass, to the protection that the Earth’s magnetic field provides for us, magnetism plays a large role in our lives.

A magnet is any object that produces its own magnetic field that interacts with other magnetic fields. Magnets have two poles, a north pole and a south pole. The magnetic field is represented by field lines that start at a magnet’s north pole and end at the south pole. bbc.co.uk

Ferromagnetic materials, the material that all magnets are made of (metals like iron, nickel and cobalt) have some unpaired electrons in their atoms. These electrons are always spinning and create their own magnetic field, albeit a very weak one.