{"id":373,"date":"2013-11-04T09:33:40","date_gmt":"2013-11-04T09:33:40","guid":{"rendered":"https:\/\/blogs.ua.es\/ffic\/?p=373"},"modified":"2013-11-04T15:55:07","modified_gmt":"2013-11-04T15:55:07","slug":"camp-electric-1","status":"publish","type":"post","link":"https:\/\/blogs.ua.es\/ffic\/2013\/11\/04\/camp-electric-1\/","title":{"rendered":"Tema 4. Camp el\u00e8ctric (I)"},"content":{"rendered":"<p style=\"text-align: justify\">Podem imaginar-nos la nostra vida quotidiana sense l&#8217;electricitat, en particular, o l&#8217;electromagnetisme, en general? Quina \u00e9s la c\u00e0rrega total dels electrons en la moneda de 10 c\u00e8ntims d&#8217;euro? Les primeres observacions de l&#8217;atracci\u00f3 el\u00e8ctrica les van fer els grecs en l&#8217;antiguitat, els quals descobriren que l&#8217;ambre, despr\u00e9s de refregar-lo, atreia objectes petits com ara palletes o plomes. De fet, la paraula <em><strong>el\u00e8ctric<\/strong><\/em> prov\u00e9 del mot <em>elektron<\/em>, que significa ambre. Actualment, l&#8217;electricitat continua sent un camp d&#8217;investigaci\u00f3 i d&#8217;aplicaci\u00f3. L&#8217;<strong>enginyeria el\u00e8ctrica<\/strong> tracta de millorar la tecnologia el\u00e8ctrica existent, incrementant el <strong>rendiment<\/strong> i l&#8217;<strong>efici\u00e8ncia<\/strong> de dispositius el\u00e8ctrics diversos, com ara autom\u00f2bils h\u00edbrids, plantes el\u00e8ctriques, etc.<\/p>\n<p style=\"text-align: justify\">En aquest bloc comen\u00e7arem l&#8217;estudi de l&#8217;electricitat a partir de l&#8217;<strong>electrost\u00e0tica<\/strong>, que tracta de les c\u00e0rregues en rep\u00f2s, i del concepte de <strong>camp electrost\u00e0tic<\/strong>. Despr\u00e9s d&#8217;introduir les propietats el\u00e8ctriques de la mat\u00e8ria, es far\u00e0 \u00e8mfasi en el car\u00e0cter conservatiu de la c\u00e0rrega i de la seua quantitzaci\u00f3. Tot seguit estudiarem la <strong>llei de Coulomb<\/strong>, que descriu la for\u00e7a que exerceix una c\u00e0rrega en una altra. A continuaci\u00f3 introduirem el concepte de <strong>camp el\u00e8ctric<\/strong> associat amb una distribuci\u00f3 de c\u00e0rrega i veurem com es pot descriure mitjan\u00e7ant les l\u00ednies de camp que n&#8217;indiquen el m\u00f2dul i la direcci\u00f3. Finalment, estudiarem el concepte de flux del camp el\u00e8ctric que ens portar\u00e0 a l&#8217;enunciat del <strong>teorema de Gauss<\/strong> i les seues aplicacions.<\/p>\n<p style=\"text-align: justify\">El <strong>Curs Interactiu de F\u00edsica<\/strong> en Internet \u00e9s un curs de F\u00edsica general realitzat pel professor <a href=\"http:\/\/www.sc.ehu.es\/sbweb\/fisica\/Introduccion\/autor\/AUTOR.HTM\">\u00c1ngel Franco<\/a> de la <a href=\"http:\/\/www.ehu.es\/p200-home\/es\/\">Universitat del Pa\u00eds Basc<\/a>. La seg\u00fcent imatge enlla\u00e7a al bloc dedicat a l&#8217;electromagnetisme.<\/p>\n<p style=\"text-align: justify\"><a href=\"http:\/\/www.sc.ehu.es\/sbweb\/fisica_\/elecmagnet\/elecmagnet.html\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-331\" alt=\"fisica-con-ordenador1\" src=\"https:\/\/blogs.ua.es\/ffic\/files\/2013\/10\/fisica-con-ordenador1-300x46.jpg\" width=\"300\" height=\"46\" srcset=\"https:\/\/blogs.ua.es\/ffic\/files\/2013\/10\/fisica-con-ordenador1-300x46.jpg 300w, https:\/\/blogs.ua.es\/ffic\/files\/2013\/10\/fisica-con-ordenador1-500x78.jpg 500w, https:\/\/blogs.ua.es\/ffic\/files\/2013\/10\/fisica-con-ordenador1.jpg 902w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>La versi\u00f3 en castell\u00e0 i la bibliografia d&#8217;aquest bloc es pot consultar <a href=\"https:\/\/blogs.ua.es\/ffic\/programa\/tema-4\/\">ac\u00ed<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Podem imaginar-nos la nostra vida quotidiana sense l&#8217;electricitat, en particular, o l&#8217;electromagnetisme, en general? Quina \u00e9s la c\u00e0rrega total dels electrons en la moneda de 10 c\u00e8ntims d&#8217;euro? Les primeres observacions de l&#8217;atracci\u00f3 el\u00e8ctrica les van fer els grecs en &hellip; <a href=\"https:\/\/blogs.ua.es\/ffic\/2013\/11\/04\/camp-electric-1\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2285,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9319,1366],"tags":[9330,1580705],"class_list":["post-373","post","type-post","status-publish","format-standard","hentry","category-asignatura-2","category-temas","tag-asignatura-3","tag-temas"],"_links":{"self":[{"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/posts\/373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/users\/2285"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/comments?post=373"}],"version-history":[{"count":11,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/posts\/373\/revisions"}],"predecessor-version":[{"id":385,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/posts\/373\/revisions\/385"}],"wp:attachment":[{"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/media?parent=373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/categories?post=373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.ua.es\/ffic\/wp-json\/wp\/v2\/tags?post=373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}