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O que (quem) é Faraday cup - definição
Faraday cup
METAL (CONDUCTIVE) CUP DESIGNED TO CATCH CHARGED PARTICLES IN VACUUM
Faraday plate; Faraday cup in plasma diagnostics; Faraday Cup in Plasma Diagnostics
A Faraday cup is a metal (conductive) cup designed to catch charged particles in vacuum. The resulting current can be measured and used to determine the number of ions or electrons hitting the cup.
faraday
![Punch]]'' (21 July 1855)](https://commons.wikimedia.org/wiki/Special:FilePath/FaradayFatherThames.jpg?width=200 "Punch]]'' (21 July 1855)")
![Christmas Lecture]] at the [[Royal Institution]] in 1856](https://commons.wikimedia.org/wiki/Special:FilePath/Faraday Michael Christmas lecture.jpg?width=200 "Christmas Lecture]] at the [[Royal Institution]] in 1856")
![Faraday's grave at [[Highgate Cemetery]], London](https://commons.wikimedia.org/wiki/Special:FilePath/Faraday Michael grave.jpg?width=200 "Faraday's grave at [[Highgate Cemetery]], London")
![ideomotor effect]] on table-turning](https://commons.wikimedia.org/wiki/Special:FilePath/Faraday apparatus for ideomotor effect on table turning.png?width=200 "ideomotor effect]] on table-turning")
![Built in 1831, the [[Faraday disc]] was the first [[electric generator]]. The horseshoe-shaped magnet ''(A)'' created a magnetic field through the disc ''(D)''. When the disc was turned, this induced an electric current radially outward from the centre toward the rim. The current flowed out through the sliding spring contact ''m'', through the external circuit, and back into the centre of the disc through the axle.](https://commons.wikimedia.org/wiki/Special:FilePath/Faraday disk generator.jpg?width=200 "Built in 1831, the [[Faraday disc]] was the first [[electric generator]]. The horseshoe-shaped magnet ''(A)'' created a magnetic field through the disc ''(D)''. When the disc was turned, this induced an electric current radially outward from the centre toward the rim. The current flowed out through the sliding spring contact ''m'', through the external circuit, and back into the centre of the disc through the axle.")
![Plaque erected in 1876 by the [[Royal Society of Arts]] in Marylebone, London](https://commons.wikimedia.org/wiki/Special:FilePath/MICHAEL FARADAY MAN OF SCIENCE. APPRENTICE HERE. B.1791D.1867.jpg?width=200 "Plaque erected in 1876 by the [[Royal Society of Arts]] in Marylebone, London")
![Portrait of Faraday in 1842 by [[Thomas Phillips]]](https://commons.wikimedia.org/wiki/Special:FilePath/M Faraday Th Phillips oil 1842.jpg?width=200 "Portrait of Faraday in 1842 by [[Thomas Phillips]]")
![Equipment used by Faraday to make glass on display at the [[Royal Institution]] in London](https://commons.wikimedia.org/wiki/Special:FilePath/Ri 2014 - glass making - Faraday.jpg?width=200 "Equipment used by Faraday to make glass on display at the [[Royal Institution]] in London")
![Statue of Faraday in [[Savoy Place]], London. Sculptor [[John Henry Foley]].](https://commons.wikimedia.org/wiki/Special:FilePath/Statue of Michael Faraday, Savoy Place.jpg?width=200 "Statue of Faraday in [[Savoy Place]], London. Sculptor [[John Henry Foley]].")
![Three Fellows of the [[Royal Society]] offering the presidency to Faraday, 1857](https://commons.wikimedia.org/wiki/Special:FilePath/Three Fellows of the Royal Society offering the presidency o Wellcome L0022806.jpg?width=200 "Three Fellows of the [[Royal Society]] offering the presidency to Faraday, 1857")
![Artist [[Harriet Jane Moore]] who documented Faraday's life in watercolours](https://commons.wikimedia.org/wiki/Special:FilePath/Harriett Moore small.jpg?width=200 "Artist [[Harriet Jane Moore]] who documented Faraday's life in watercolours")
ENGLISH SCIENTIST
M. Faraday; Faraday death; Michael farraday; Michael Farraday; Micheal Faraday; Michael Farady; Faradayan; Faraday; Faraday, Michael; Michael faraday; Michal Faraday; Michael Faraday death; Death of Michael Faraday; Sarah Barnard
['far?de?]
(abbrev.: F)
¦ noun Chemistry a unit of electric charge equal to Faraday's constant.
Origin
early 20th cent.: from the name of the 19th-cent. English physicist Michael Faraday.
Faraday effect
PHYSICAL LAW
Faraday Effect; Faraday rotation; Rotation measure; Faraday Rotation; Faraday rotation measure; Farday effect
The Faraday effect or Faraday rotation, sometimes referred to as the magneto-optic Faraday effect (MOFE), is a physical magneto-optical phenomenon. The Faraday effect causes a polarization rotation which is proportional to the projection of the magnetic field along the direction of the light propagation.
