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In classical electromagnetism, Ampère's circuital law (not to be confused with Ampère's force law) [1] relates the circulation of a magnetic field around a closed loop to the electric current passing through the loop. James Clerk Maxwell derived it using hydrodynamics in his 1861 published paper "On Physical Lines of Force". [2]
A loop antenna is a radio antenna consisting of a loop or coil of wire, tubing, or other electrical conductor, that for transmitting is usually fed by a balanced power source or for receiving feeds a balanced load. Within this physical description there are two (possibly three) distinct types:
Loop antenna - a coil which serves as a radio antenna, to convert radio waves to electric currents. Rogowski coil - a toroidal coil used as an AC measuring device; Musical instrument pickup - a coil used to produce the output audio signal in an electric guitar or electric bass. Flux gate - a sensor coil used in a magnetometer
Maxwell added displacement current to the electric current term in Ampère's circuital law. In his 1865 paper A Dynamical Theory of the Electromagnetic Field Maxwell used this amended version of Ampère's circuital law to derive the electromagnetic wave equation. This derivation is now generally accepted as a historical landmark in physics by ...
Thus, a depiction of the field around a loop of flux (as would be produced in a toroidal inductor) is qualitatively the same as the field around a loop of current. The figure to the right is an artist's depiction of the field. The thicker lines indicate paths of higher average intensity (shorter paths have higher intensity so that the path ...
Ampère's circuital law, in physics, relates the circulating magnetic field in a closed loop to the electric current through the loop. Discovered by André-Marie Ampère . Anderson's rule is used for the construction of energy band diagrams of the heterojunction between two semiconductor materials.
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Here denotes the number of turns in loop ; is the magnetic flux through loop ; and , are some constants described below. This equation follows from Ampere's law: magnetic fields and fluxes are linear functions of the currents.
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