magnetic field

noun

1. 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.
2. magnetic intensity.

magnetic field

noun

1. See electric field
   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

1. 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.
2. See Note at magnetism
3. See magnetic field strength

magnetic field

1. 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 .)

Word History and Origins

Origin of magnetic field¹

First recorded in 1835–45

Example Sentences

Because they are not deflected by magnetic fields, gamma rays point back to their sources, revealing the whereabouts of the itinerant cosmic rays.

From Science News

Armed with magnetometers for measuring magnetic fields, researchers also mapped out the magnetic orientation of seafloor rocks — how their iron-bearing minerals are oriented relative to Earth’s field.

From Science News

Cosmologists have no end of ideas, but one overlooked option is the possible existence of magnetic fields at the birth of the universe.

From Quanta Magazine

When he then induced an artificial magnetic field around the tanks, the turtles continued in what they thought was a northeasterly direction.

From Nautilus

The combination of intense magnetic fields and hot gasses boiling up from below the surface creates the streaky appearance in the image, as hot and cool gas spiders out from the darker center, said the NSO in a press release.

From Popular-Science

That shows the magnetic field at work protecting us from these highly energetic particles.

From The Daily Beast

While every neutron star has an intense magnetic field, the ones known as magnetars are exceptional.

From The Daily Beast

The pulses are from a beam of light produced by the intense magnetic field, which sweeps across Earth as the neutron star rotates.

From The Daily Beast

During that passage, the intense magnetic field twisted the light.

From The Daily Beast

Magnetic-field exposure is typically associated with microwave ovens, power lines, vacuum cleaners, and hair dryers.

From The Daily Beast

This magnetic field can be increased in value, without increasing the current in the conductor, by adding more turns to the coil.

From Project Gutenberg

The current produced by the induced electrical pressure aids the current in the winding of coil A in producing a magnetic field.

From Project Gutenberg

The strength of a magnetic field due to a current in a conductor can be greatly increased by forming a coil of the conductor.

From Project Gutenberg

A magnetic field may be produced through a coil of wire by winding it on the magnetic circuit shown in Fig. 8.

From Project Gutenberg

This simple experiment proved to Oersted that there was a magnetic field produced by the current in the conductor.

From Project Gutenberg