{"id":261,"date":"2020-02-21T17:52:59","date_gmt":"2020-02-21T16:52:59","guid":{"rendered":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/?page_id=261"},"modified":"2020-02-21T17:52:59","modified_gmt":"2020-02-21T16:52:59","slug":"25-elettrometro-di-braun","status":"publish","type":"page","link":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/25-elettrometro-di-braun\/","title":{"rendered":"25. Elettrometro di Braun"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"300\" src=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160953-213x300.jpg\" alt=\"\" class=\"wp-image-262\" srcset=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160953-213x300.jpg 213w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160953-768x1083.jpg 768w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160953-726x1024.jpg 726w\" sizes=\"(max-width: 213px) 100vw, 213px\" \/><\/figure>\n\n\n\n<p><strong>IT<\/strong> &#8211; Ideato nel 1887 dal fisico tedesco Karl Ferdinard Braun, questo elettrometro permette la misura della differenza di potenziale che si genera tra un oggetto posto a contatto con il pomello superiore e l\u2019apparecchio stesso, collegato a terra. Lo strumento \u00e8 costituito da una scatola cilindrica metallica al cui interno \u00e8 presente un sottile ago metallico girevole attorno ad un asse orizzontale, sorretto da una striscia metallica verticale piegata due volte al centro ad angolo retto. La rotazione dell\u2019ago, provocata dalla repulsione elettrostatica, permette di leggere direttamente su una scala graduata la differenza di potenziale cercata.<strong> <\/strong><\/p>\n\n\n\n<p><strong>GB <\/strong>&#8211;\u00a0\u00a0 Braun electrometer &#8211; Designed in 1887 by the German physicist Karl\nFerdinard Braun, this electrometer allows the measurement of the potential\ndifference that is generated between an object placed in contact with the upper\nknob and the device itself, connected to earth. The instrument consists of a\ncylindrical metal box inside which there is a thin metal needle rotating around\na horizontal axis, supported by a vertical metal strip bent twice in the center\nat a right angle. The rotation of the needle, caused by electrostatic\nrepulsion, allows to read directly on a graduated scale the potential\ndifference sought.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>IT &#8211; Ideato nel 1887 dal fisico tedesco Karl Ferdinard Braun, questo elettrometro permette la misura della differenza di potenziale che si genera tra un oggetto posto a contatto con&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/261"}],"collection":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/comments?post=261"}],"version-history":[{"count":1,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/261\/revisions"}],"predecessor-version":[{"id":264,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/261\/revisions\/264"}],"wp:attachment":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/media?parent=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}