{"id":199,"date":"2020-02-21T15:02:52","date_gmt":"2020-02-21T14:02:52","guid":{"rendered":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/?page_id=199"},"modified":"2020-02-21T15:02:52","modified_gmt":"2020-02-21T14:02:52","slug":"14-scala-di-cross","status":"publish","type":"page","link":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/14-scala-di-cross\/","title":{"rendered":"14. Scala di Cross"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"276\" src=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20191028_114709-300x276.jpg\" alt=\"\" class=\"wp-image-200\" srcset=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20191028_114709-300x276.jpg 300w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20191028_114709-768x708.jpg 768w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20191028_114709-1024x943.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<p><strong>IT<\/strong> &#8211; Questo strumento, ideato dal fisico statunitense Charles Robert Cross alla fine del XIX secolo, permette di studiare la conduzione elettrica nei gas a basse pressioni. Esso \u00e8 formato da sei tubi di vetro di uguale lunghezza, disposti verticalmente e montati in parallelo su un telaio di legno. Gli elettrodi superiori di ciascun tubo sono collegati in serie tramite un filo metallico, mentre il contatto con l\u2019elettrodo inferiore si realizza di volta in volta attraverso uno spinotto. Nei tubi \u00e8 praticato il vuoto in diverso grado.\u00a0Fornendo corrente elettrica ai vari tubi si possono osservare diversi aspetti caratteristici della scarica elettrica nei gas rarefatti, a seconda del grado di vuoto praticato nel tubo.<\/p>\n\n\n\n<p><strong>GB &#8211;  <\/strong>Cross stairway &#8211; This instrument,\nconceived by the American physicist Charles Robert Cross at the end of the\nnineteenth century, allows to study the electrical conduction in gases at low\npressures. It is made up of six glass tubes of equal length, arranged vertically\nand mounted in parallel on a wooden frame. The upper electrodes of each tube\nare connected in series by means of a metal wire, while contact with the lower\nelectrode occurs from time to time through a plug. Vacuum is practiced in the\ntubes to varying degrees. By supplying electric current to the various pipes,\ndifferent characteristic aspects of the electric discharge in the rarefied\ngases can be observed, depending on the degree of vacuum practiced in the pipe.<strong> <\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IT &#8211; Questo strumento, ideato dal fisico statunitense Charles Robert Cross alla fine del XIX secolo, permette di studiare la conduzione elettrica nei gas a basse pressioni. Esso \u00e8 formato&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\/199"}],"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=199"}],"version-history":[{"count":1,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/199\/revisions"}],"predecessor-version":[{"id":202,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/199\/revisions\/202"}],"wp:attachment":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/media?parent=199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}