electromagnetism

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Related to Magnetic waves: Electromagnetic waves

electromagnetism

1. magnetism produced by an electric current
2. the branch of physics concerned with magnetism produced by electric currents and with the interaction of electric and magnetic fields

Electromagnetism

The branch of science dealing with the observations and laws relating electricity to magnetism. Electromagnetism is based upon the fundamental observations that a moving electric charge produces a magnetic field and that a charge moving in a magnetic field will experience a force. The magnetic field produced by a current is related to the current, the shape of the conductor, and the magnetic properties of the medium around it by Ampère's law. The magnetic field at any point is described in terms of the force that it exerts upon a moving charge at that point. The electrical and magnetic units are defined in terms of the ampere, which in turn is defined from the force of one current upon another. The association of electricity and magnetism is also shown by electromagnetic induction, in which a changing magnetic field sets up an electric field within a conductor and causes the charges to move in the conductor. See Eddy current, Electricity, Electromagnetic induction, Faraday's law of induction, Hall effect, Inductance, Lenz's law, Reluctance

electromagnetism

[i¦lek·trō′mag·nə‚tiz·əm]
(physics)
Branch of physics relating electricity to magnetism.
Magnetism produced by an electric current rather than by a permanent magnet.
References in periodicals archive ?
Now, using a sensitive instrument aboard NASA's Solar Dynamics Observatory, McIntosh and colleagues have discovered magnetic waves throughout the corona and the transition zone between it and the chromosphere.
Moving diagonally from the center in Figure 1b, (Pythagorean Theorem), the photon half waves alternate between the electro and magnetic waves as photon energy in a vacuum which is the way light travels.
Scientists are now using pulsating magnetic waves to treat depression and schizophrenia.
Because it can selectively detect both acoustic and magnetic waves, Brillouin light scattering can provide unique information on the coupling between magnetic states and thermal phonons.
Prof Zharkova and her team postulate from their observations of the whole sun that sun spots on the solar surface are caused by the movement of a pair of background magnetic waves across its interior and surface, in both hemispheres.
Washington, Oct 16 ( ANI ): Researchers have found evidence that magnetic waves in a polar coronal hole contain enough energy to heat the corona and that they also deposit most of their energy at sufficiently low heights for the heat to spread throughout the corona.
According to the project's executors, the production of conductive fabrics began in 2007 aiming at receiving signals from the heart and transferring them to the doctor in the form of magnetic waves.
It stimulates blood flow to the injured area using massage combined with needles and magnetic waves.
Air traffic controllers, meteorological service personnel, telecommunications technicians and others claim their daily exposure to the magnetic waves emitted by the portals are dangerous.
Mr Thomas Varghese attempts to scare the world, telling us we are being bombarded on a daily basis by magnetic waves by everything from space satellite to TV.
Magnetic waves theorized to transfer heat from the surface of the sun to its outer atmosphere have been directly observed for the first time, a team reports in the March 20 Science.
Mammograms use low-dose X-rays to make images of the breast while MRI scans - which are more expensive - rely on magnetic waves.