Citation, DOI and article data. Bell, D. Tesla SI unit. Reference article, Radiopaedia. URL of Article. Terminology As for all eponymous SI units when the unit is written out in full it is not capitalized, but when shortened to its symbol it is capitalized.
History and etymology It is named after Nikola Tesla 2 , a Croatian-American physicist, inventor and electrical engineer. Quiz questions. Finlay, C. International Geomagnetic Reference Field: the eleventh generation. Haas LF. Nikola Tesla Related articles: Imaging physics.
Promoted articles advertising. The SI units Tesla and Gauss are therefore not basic units of measurement: the magnetic flux density can finally be calculated from the force of moving charges. The following relationship applies:. A Tesla is equal to a Newton per meter and ampere.
An exemplary example illustrates this: It corresponds exactly to the flux density of a Tesla, which exerts on a 1 meter long electrical conductor, which in turn conducts a current of 1 ampere, exactly 1 Newton attraction. The necessary magnetic field is created by the current flow in the conductor or by the moving electrons.
In the literature, the magnetic field strength often includes the Tesla unit. As already mentioned, this is not entirely correct: Gauss and Tesla are the units for the magnetic flux density.
In the SI system, the magnetic field strength is given in units of oersteds or amps per meter:. To be able to use magnet-shop. H may be thought of as an externally applied "magnetizing force," whereas B represents the actual magnetic field induced within a region of space. It is necessary to distinguish between H and B because the electromagnetic field at a given point in space depends not only on the distribution of electrical currents giving rise to that field reflected in H but also on the type of matter occupying the region reflected in B.
When no matter is present i. Since B is measured in tesla newtons per ampere-meter , the SI units for H must therefore be amperes per meter.
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