A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field.
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, and attracts or repels other magnets.
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.
2. Relating to the magnetic poles of the earth: a magnetic compass bearing.
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magnetic amplitude; magnetic course; magnetic meridian.
Pulses of strong magnetic fields are used in FMRI (functional magnetic resonance imaging) for monitoring brain activity and in MRI for imaging tissues throughout the body.
Define magnetic: of or relating to a magnet or magnetism — magnetic in a sentence.
A smaller magnetic field unit is the Gauss (1 Tesla = 10,000 Gauss). The magnetic quantity B which is being called "magnetic field" here is sometimes called "magnetic flux density".
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