View synonyms for magnetic field

magnetic field

noun

a region of space near a magnet, electric current, or moving charged particle in which a magnetic force acts on any other magnet, electric current, or moving charged particle.
magnetic intensity.

magnetic field

noun

a field of force surrounding a permanent magnet or a moving charged particle, in which another permanent magnet or moving charge experiences a force Compare electric field

magnetic field

A field of force associated with changing electric fields , as when electric charges are in motion. Magnetic fields exert deflective forces on moving electric charges. Most magnets have magnetic fields as a result of the spinning motion of the electrons orbiting the atoms of which they are composed; electromagnets create such fields from electric current moving through coils. Large objects, such as the earth, other planets, and stars, also produce magnetic fields.
See Note at magnetism
See magnetic field strength

magnetic field

A magnetic field is said to exist in a region if a force can be exerted on a magnet . If a compass needle is deflected when it is put at a particular location, we say a magnetic field exists at that point, and the strength of the field is measured by the strength of the force of the compass needle. The Earth , the sun , and the Milky Way galaxy all have magnetic fields. All known magnetic fields are caused by the movement of electrical charges . Electrons in orbit in atoms give rise to magnetic fields, so that every atom is, like the Earth, surrounded by a magnetic field. ( See magnet and magnetism .)

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Word History and Origins

Origin of magnetic field¹

First recorded in 1835–45

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Example Sentences

While similar to MRI - which was also developed in Aberdeen - the FCI scanner is described as being able to vary the strength of the magnetic field during the patient's scan.

From BBC

The natural phenomenon takes place when the Earth's magnetic field is disrupted by the solar wind, a stream of charged particles released by the Sun.

From BBC

Understanding how the Earth's core works is essential to understanding the magnetic field that protects the planet, and whether that could weaken or stop.

From BBC

When these particles interact with the Earth's magnetic field the sky lights up with dazzling auroras.

From BBC

It could also involve the formation of magnetic fields in the early universe or another particle in the universe called the neutrino.

From Salon

magnetic equator magnetic flux

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