{"id":467,"date":"2020-04-16T21:25:32","date_gmt":"2020-04-16T21:25:32","guid":{"rendered":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/?page_id=467"},"modified":"2020-04-16T21:25:32","modified_gmt":"2020-04-16T21:25:32","slug":"copperdisk","status":"publish","type":"page","link":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/exhibits\/em\/copperdisk\/","title":{"rendered":"The Rotating Copper Disk"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p>&nbsp; Turn the crank to set the copper disk rotating. You will see the rotating copper disk drags the compass needle along. HOW COME? There must be an external magnetic field Bext pushing on the compass needle, how does it come about? Electrons which are embedded in the metal of the disk are being dragged&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":63,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-467","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/pages\/467","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/comments?post=467"}],"version-history":[{"count":3,"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/pages\/467\/revisions"}],"predecessor-version":[{"id":477,"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/pages\/467\/revisions\/477"}],"up":[{"embeddable":true,"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/pages\/63"}],"wp:attachment":[{"href":"https:\/\/www.physics.wisc.edu\/ingersollmuseum\/wp-json\/wp\/v2\/media?parent=467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}