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A Faraday cage or Faraday shield is an enclosure used to block some electromagnetic fields. A Faraday shield may be formed by a continuous covering of conductive material, or in the case of a Faraday cage, by a mesh of such materials. Faraday cages are named after scientist Michael Faraday, who first constructed one in 1836. [1]
For static or slowly varying magnetic fields (below about 100 kHz) the Faraday shielding described above is ineffective. In these cases shields made of high magnetic permeability metal alloys can be used, such as sheets of permalloy and mu-metal [ 9 ] [ 10 ] or with nanocrystalline grain structure ferromagnetic metal coatings. [ 11 ]
It is also known as a unipolar generator, acyclic generator, disk dynamo, or Faraday disc. The voltage is typically low, on the order of a few volts in the case of small demonstration models, but large research generators can produce hundreds of volts, and some systems have multiple generators in series to produce an even larger voltage. [ 1 ]
Cage (bearing), a component of a rolling-element bearing; Cage, a separated enclosure in a computer colocation centre; Batting cage (or tunnel), an enclosure for baseball or softball batting practice; Faraday cage, or Faraday shield, an enclosure used to block electromagnetic fields; Rib cage, a part of the skeleton
Faraday (unit), or just faraday – An obsolete unit of charge that has been superseded by the coulomb; farad, SI unit of capacitance; Faraday balance – Device for measuring magnetism of an object; Faraday cage – Enclosure of conductive mesh used to block electric fields; Faraday constant – The amount of electric charge per mole of electrons
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