Magnetic Dipole

A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not complete. In particular, a magnetic monopole, the magnetic analogue of an electric charge, has never been observed. Moreover, one form of magnetic dipole moment is associated with a fundamental quantum property, the spin of elementary particles.

The magnetic field around any magnetic source looks increasingly like the field of a magnetic dipole as the distance from the source increases.

Read more about Magnetic DipoleExternal Magnetic Field Produced By A Magnetic Dipole Moment, Internal Magnetic Field of A Dipole, Forces Between Two Magnetic Dipoles, Dipolar Fields From Finite Sources

Other articles related to "magnetic, magnetic dipole, dipole, magnetic dipoles, dipoles":

Magnetic Monopole - Poles and Magnetism in Ordinary Matter
... every atom on the periodic table and every particle in the standard model—has no magnetic monopole charge ... Therefore, the ordinary phenomena of magnetism and magnets have nothing to do with magnetic monopoles ... First, electric currents create magnetic fields according to Ampère's law ...
Magnetic Dipole–dipole Interaction
... Magnetic dipoledipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles ... vector parallel to the line joining the centers of the two dipoles ... rjk is the distance between two dipoles, mk and mj ...
Magnetic Dipole - Dipolar Fields From Finite Sources
... See also Near and far field The magnetic scalar potential ψ produced by a finite source, but external to it, can be represented by a multipole expansion ... Monopole moments have a 1/r rate of decrease, dipole moments have a 1/r2 rate, quadrupole moments have a 1/r3 rate, and so on ... Since the lowest-order term observed in magnetic sources is the dipolar term, it dominates at large distances ...
Relaxation (NMR) - Microscopic Mechanisms
... mechanism for a nucleus to change orientation with respect to the applied magnetic field and/or interchange energy with the surroundings (called the lattice) ... The most common mechanism is the magnetic dipole-dipole interaction between the magnetic moment of a nucleus and the magnetic moment of another nucleus or other entity (electron, atom, ion ... This interaction depends on the distance between the pair of dipoles (spins) but also on their orientation relative to the external magnetic field ...
Theory - Atomic Hyperfine Structure - Magnetic Dipole
... The dominant term in the hyperfine Hamiltonian is typically the magnetic dipole term ... Atomic nuclei with a non-zero nuclear spin have a magnetic dipole moment, given by , where is the g-factor and is the nuclear magneton ... There is an energy associated with a magnetic dipole moment in the presence of a magnetic field ...

Famous quotes containing the word magnetic:

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