{"id":3678,"date":"2015-06-16T14:02:18","date_gmt":"2015-06-16T14:02:18","guid":{"rendered":"http:\/\/www.swatlibraries.org\/projects\/speed\/anna\/2015\/06\/16\/jumping-ring\/"},"modified":"2024-01-19T19:10:51","modified_gmt":"2024-01-19T19:10:51","slug":"jumping-ring","status":"publish","type":"post","link":"https:\/\/demos.swarthmore.edu\/physics\/2015\/06\/jumping-ring\/","title":{"rendered":"Jumping Ring"},"content":{"rendered":"<p><a href=\"https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-6611 aligncenter\" src=\"https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-300x225.jpg\" alt=\"Both the old jumping ring and the new jumping ring apparatus.\" width=\"300\" height=\"225\" srcset=\"https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-300x225.jpg 300w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-1024x768.jpg 1024w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-768x576.jpg 768w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-1536x1152.jpg 1536w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-2048x1536.jpg 2048w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-772x579.jpg 772w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/20220830_101941-624x468.jpg 624w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/Jumping-ring.jpg\" alt=\"Jumping Ring demo picture\" width=\"337\" height=\"253\" \/><\/p>\n<ul>\n<li><span style=\"font-size: large\">Fluctuating B field causes ring to either 1) jump off of apparatus, or 2) levitate.\u00a0<\/span><\/li>\n<li><span style=\"font-size: large\">For new apparatus (right in top picture): plug into wall and push the switch on the right down to let current flow. For old apparatus (left in top picture): plug Apparatus into variac; turn variac knob to set current amount; flip variac switch to &#8220;on&#8221; position to produce instantaneous B field.<\/span><\/li>\n<li><span style=\"font-size: large\">For added excitement, cool rings with LN2 to increase conductivity.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left\"><span style=\"text-decoration: underline\">Notes about use<\/span><\/p>\n<ul>\n<li><span style=\"font-size: large\">For old apparatus: apparatus is pretty old. Iron rods not securely connected to wooden base. Hold onto base<em> and<\/em> rods, when lifting or transporting.<\/span><\/li>\n<li><span style=\"font-size: large\">Do not touch apparatus when current is flowing (variac on or switch pressed).<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"font-size: large\">Jumping ring apparatus located in L01, section B2. Variac<br \/>\nlocated in L01, section A1.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Fluctuating B field causes ring to either 1) jump off of apparatus, or 2) levitate.\u00a0 For new apparatus (right in top picture): plug into wall and push the switch on the right down to let current flow. For old apparatus (left in top picture): plug Apparatus into variac; turn variac knob to set current amount; &hellip; <a href=\"https:\/\/demos.swarthmore.edu\/physics\/2015\/06\/jumping-ring\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Jumping Ring<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4714,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44,4],"tags":[177,232],"_links":{"self":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3678"}],"collection":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/comments?post=3678"}],"version-history":[{"count":3,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3678\/revisions"}],"predecessor-version":[{"id":6612,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3678\/revisions\/6612"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media\/4714"}],"wp:attachment":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media?parent=3678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/categories?post=3678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/tags?post=3678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}