{"id":9728,"date":"2023-09-26T22:27:40","date_gmt":"2023-09-26T20:27:40","guid":{"rendered":"https:\/\/agora.xtec.cat\/zermoianesllevant\/?page_id=9728"},"modified":"2023-09-26T22:44:21","modified_gmt":"2023-09-26T20:44:21","slug":"4-lelectroimant","status":"publish","type":"page","link":"https:\/\/agora.xtec.cat\/zermoianesllevant\/steam\/a-prenem-el-vent\/4-lelectroimant\/","title":{"rendered":"4. L\u2019ELECTROIMANT"},"content":{"rendered":"<p>El descobriment d\u2019\u00d8rsted va obrir moltes portes a la naixent ci\u00e8ncia i tecnologia el\u00e8ctriques del segle XIX. Com aprofitar aquesta propietat de l\u2019electricitat per crear magnetisme? Per fer qu\u00e8?<\/p>\n<p>Una de les primeres idees tecnol\u00f2giques fou que aquesta propietat feia possible tenir imants a voluntat, \u00e9s a dir, que mentre hi passi corrent, el fil esdev\u00e9 un imant. Tenia els seu inter\u00e8s, la idea, perqu\u00e8 en aquella \u00e8poca els \u00fanics imants existents eren fets amb mineral d\u2019\u00f2xid de ferro anomenat magnetita, que tenia propietats magn\u00e8tiques de manera natural.<\/p>\n<p>Per\u00f2 el magnetisme d\u2019un sol fil el\u00e8ctric \u00e9s molt feble, aix\u00ed que la primera idea per a fer un imant el\u00e8ctric consisteix en sumar el magnetisme de molts fils. Per\u00f2 com fer-ho? Si en l\u2019experi\u00e8ncia d\u2019\u00d8rsted s\u2019han explorat m\u00e9s possibilitats que la de posar el fil en paral\u00b7lel a l\u2019agulla de la br\u00faixola, com per exemple donar una volta a la br\u00faixola, s\u2019observa que el cop brusc que fa girar l\u2019agulla \u00e9s m\u00e9s intents. De manera que si fem moltes voltes (espires) sumarem el magnetisme de cada volta. Aquesta \u00e9s la idea: fer una bobina amb un sol fil.<\/p>\n<table style=\"border-collapse: collapse; width: 76.4349%;\">\n<tbody>\n<tr>\n<td style=\"width: 23.9075%;\"><a href=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9732\" src=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-1.jpg\" alt=\"\" width=\"255\" height=\"244\" \/><\/a><\/td>\n<td style=\"width: 24.5073%;\"><a href=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9733\" src=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-2.jpg\" alt=\"\" width=\"265\" height=\"241\" \/><\/a><\/td>\n<td style=\"width: 28.0204%;\"><a href=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-9734\" src=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/Bobina-3.jpg\" alt=\"\" width=\"302\" height=\"231\" \/><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Guia didactica: <a href=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-content\/uploads\/usu130\/2023\/09\/4.-La-invencio-de-lelectroimant_1.pdf\">4. La invenci\u00f3 de l&#8217;electroimant<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>El descobriment d\u2019\u00d8rsted va obrir moltes portes a la naixent ci\u00e8ncia i tecnologia el\u00e8ctriques del segle XIX. Com aprofitar aquesta propietat de l\u2019electricitat per crear magnetisme? Per fer qu\u00e8?<br \/>\nUna de les primeres idees tecnol\u00f2giques fou que aquesta propietat feia possible tenir imants a voluntat, \u00e9s&hellip;  <a href=\"https:\/\/agora.xtec.cat\/zermoianesllevant\/steam\/a-prenem-el-vent\/4-lelectroimant\/\" title=\"Read 4. L\u2019ELECTROIMANT\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":9467,"menu_order":60,"comment_status":"closed","ping_status":"closed","template":"page-templates\/side-menu.php","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"class_list":["post-9728","page","type-page","status-publish","hentry"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/pages\/9728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/comments?post=9728"}],"version-history":[{"count":4,"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/pages\/9728\/revisions"}],"predecessor-version":[{"id":9738,"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/pages\/9728\/revisions\/9738"}],"up":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/pages\/9467"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/zermoianesllevant\/wp-json\/wp\/v2\/media?parent=9728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}