Magnetic Field in a sentence

Energy stored in magnetic fields main seeAlso Energy is needed to generate a magnetic field both to work against the electric field that a changing magnetic field creates and to change the magnetization of any material within the magnetic field.

Magnetic flux The magnetic flux density ( magnetic field ) having the unit Wb/m 2 ( Tesla ) is denoted by B, and magnetic flux is defined analogously: : with the same notation above.

Magnetic field main The main part of Earth's magnetic field is generated in the core, the site of a dynamo process that converts kinetic energy of fluid convective motion into electrical and magnetic field energy.

It revealed a change in the microscopic structure when magnetic spirals that are aligned along a magnetic field drift away from it when the magnetic field increases.

Magnetic field and electric currents Currents of electric charges both generate a magnetic field and feel a force due to magnetic B-fields.

Magnetic field lines would start or end on magnetic monopoles, so if they exist, they would give exceptions to the rule that magnetic field lines neither start nor end.

The force on each magnet depends on its magnetic moment and the magnetic field Either B or H may be used for the magnetic field outside of the magnet.

The magnetic field produced by an atom—its magnetic moment —is determined by these various forms of angular momentum, just as a rotating charged object classically produces a magnetic field.

With turns of the winding oriented perpendicularly to the magnetic field lines, the flux is the product of the magnetic flux density and the core area, the magnetic field varying with time according to the excitation of the primary.

Faraday's law states that the curl of an electric field is equal to the opposite of the time rate of change of the magnetic field, while Ampère's law relates the curl of the magnetic field to the current and rate of change of the electric field.

Maxwell's addition to Ampère's law is particularly important: it shows that not only does a changing magnetic field induce an electric field, but also a changing electric field induces a magnetic field.

Adiabatic invariance The properties of magnetic mirrors can be derived using the adiabatic invariance of magnetic flux under changes in magnetic field strength.

Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments.

Gauss ordered a magnetic observatory to be built in the garden of the observatory, and with Weber founded the "Magnetischer Verein" (magnetic club in German ), which supported measurements of Earth's magnetic field in many regions of the world.

If an object has a certain magnetic flux over its surface area, and that area shrinks to a smaller area, but the magnetic flux is conserved, then the magnetic field would correspondingly increase.

In contrast with this behavior, diamagnetic materials are repelled by magnetic fields and form induced magnetic fields in the direction opposite to that of the applied magnetic field.

In theory, it is possible for a magnetic sail to launch directly from the surface of a planet near one of its magnetic poles, repelling itself from the planet's magnetic field.

Magnetic coupling Inductive coupling or magnetic coupling (MC) occurs when a varying magnetic field exists between two parallel conductors typically less than a wavelength apart, inducing a change in voltage along the receiving conductor.

Magnetic force Magnetic lines of force of a bar magnet shown by iron filings on paper main The phenomenon of magnetism is "mediated" by the magnetic field.

Magnetic hyperthermia makes use of magnetic nanoparticles, which can be injected into tumours and then generate heat when subjected to an alternating magnetic field.