{"id":1231,"date":"2021-02-11T14:05:00","date_gmt":"2021-02-11T12:05:00","guid":{"rendered":"http:\/\/www.museoscienzebergamo.it\/fisicaalmuseo\/?post_type=portfolio&#038;p=1231"},"modified":"2021-02-11T14:05:00","modified_gmt":"2021-02-11T12:05:00","slug":"induction-coil","status":"publish","type":"portfolio","link":"https:\/\/www.museoscienzebergamo.it\/fisicaalmuseo\/en\/strumenti-en\/induction-coil\/","title":{"rendered":"Induction coil"},"content":{"rendered":"<p class=\"p1\"><span class=\"s1\">The induction coil is mounted on a wooden board; the primary and secondary coils, which are isolated from each other, are wound around the same reel; a core made of iron wire can slide in a hole in the centre of the coil. The ends of the primary coil are connected to two clamps, as are those of the secondary coil.<br \/>\nTwo small electromagnets are mounted on the board, above which there is an armature in a horizontal position with a return spring and a plate switch supported by two brass columns.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">When the primary coil is connected to a battery, the current also passes through the switch, the electromagnet is magnetized and attracts the armature, and the circuit is broken. The electromagnet&#8217;s core is thus demagnetized and the armature rises, closing the circuit again and allowing the current to flow once more; the process is repeated. The repeated interruptions of the current cause an induced current to be generated in the secondary coil, which can be drawn from the clamps.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">The instrument is signed by its maker, Alemanno \u2013 Gastaldi, Torino.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">Devices of this type are widespread in physics laboratories; they illustrate the phenomenon of electromagnetic induction that was discovered in 1831 by the English physicist Michael Faraday (1791 &#8211; 1867), which forms the basis of electromagnetism.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">Device on display.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The induction coil is mounted on a wooden board; the primary and secondary coils, which are isolated from each other, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":463,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"portfolio_category":[22],"class_list":["post-1231","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","portfolio_category-electricity"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Induction coil | fisicaalmuseo.it<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.museoscienzebergamo.it\/fisicaalmuseo\/en\/strumenti-en\/induction-coil\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Induction coil | fisicaalmuseo.it\" \/>\n<meta property=\"og:description\" content=\"The 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