{"id":6374,"date":"2010-08-25T03:00:44","date_gmt":"2010-08-25T08:00:44","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=6374"},"modified":"2010-08-25T03:00:44","modified_gmt":"2010-08-25T08:00:44","slug":"eddys-back","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/6374","title":{"rendered":"Eddy&#039;s Back"},"content":{"rendered":"<p><object class=\"embed\" width=\"425\" height=\"264\" type=\"application\/x-shockwave-flash\" \ndata=\"http:\/\/www.youtube.com\/v\/URhpHj_O6dc?fs=1\"><param name=\"wmode\" value=\"transparent\" \/><param name=\"movie\" value=\"http:\/\/www.youtube.com\/v\/URhpHj_O6dc?fs=1\" \/><em>You need to a flashplayer enabled browser to view this YouTube video<\/em><\/object><\/p>\n<p>Fun stuff.  The nonmagnetic but conductive materials will see a changing magnetic field, or will &#8220;break&#8221; field lines, as the jargon goes, which induces eddy currents to flow and produce a field (that&#8217;s Faraday&#8217;s Law), with the induced field opposing the change (Lenz&#8217;s Law).  This gives a braking effect, as you can see.  Interesting that the nickel is largely unaffected by this; the composition is 75% copper and 25% nickel, while for the quarter, it is 91.67% and 8.33%.<\/p>\n<p>I&#8217;ve linked to <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/615\">eddy current effects<\/a> before, but still wanted to do my own video.  I tried to narrate it while filming, but keeping everything in the frame and talking (while my hands were occupied with the demo) was too tough.  I did a couple of disastrous takes and then had a fit and stormed off to my trailer, vowing to never work with myself again.  I finally calmed myself down and did the silent shot, then waited impatiently for me to do the post-production.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You need to a flashplayer enabled browser to view this YouTube video Fun stuff. The nonmagnetic but conductive materials will see a changing magnetic field, or will &#8220;break&#8221; field lines, as the jargon goes, which induces eddy currents to flow &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/6374\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,63],"tags":[],"class_list":["post-6374","post","type-post","status-publish","format-standard","hentry","category-physics","category-video"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/6374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/comments?post=6374"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/6374\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=6374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=6374"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=6374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}