{"id":3664,"date":"2015-06-16T14:02:14","date_gmt":"2015-06-16T14:02:14","guid":{"rendered":"http:\/\/www.swatlibraries.org\/projects\/speed\/anna\/2015\/06\/16\/parallel-currents\/"},"modified":"2024-01-19T19:10:52","modified_gmt":"2024-01-19T19:10:52","slug":"parallel-currents","status":"publish","type":"post","link":"https:\/\/demos.swarthmore.edu\/physics\/2015\/06\/parallel-currents\/","title":{"rendered":"Parallel Currents"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"\/physics\/wp-content\/uploads\/sites\/2\/2015\/06\/Parallel-Currents.jpg\" alt=\"Parallel Currents demo picture\" width=\"366\" height=\"274\" \/><\/p>\n<p><a href=\"http:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires.jpg\" rel=\"attachment wp-att-6149\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-6149\" src=\"http:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-300x169.jpg\" alt=\"force on parallel wires\" width=\"691\" height=\"389\" srcset=\"https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-300x169.jpg 300w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-768x432.jpg 768w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-1024x576.jpg 1024w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-772x434.jpg 772w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires-624x351.jpg 624w, https:\/\/demos.swarthmore.edu\/physics\/wp-content\/uploads\/sites\/2\/2018\/05\/force-on-parallel-wires.jpg 1753w\" sizes=\"(max-width: 691px) 100vw, 691px\" \/><\/a><\/p>\n<ul>\n<li><span style=\"font-size: large;\">Demonstrate force between parallel currents.<\/span><\/li>\n<li>Using two power supplies, send current through\u00a0both stationary and balancing wires.<\/li>\n<li>Angle of mirror connected to pivot will change as wires are pulled together or pushed apart due to Lorentz force. A laser beam, deflected by mirror, can be used to show the otherwise imperceptible change of mirror angle.<\/li>\n<li>To determine the strength of the Lorentz force: mark the laser position on a distant wall both with and without current- using current that produces attraction, not repulsion. Then, with current off, place small pieces of folded up tin foil on top of movable wire (using platform on wire) until deflection of laser matches that produced by Lorentz force. Weigh tin foil pieces with sensitive digital scale to determine gravitational force.<\/li>\n<li>Compare gravitational force to Lorentz force.<\/li>\n<li>Distance between wires, and wire length, can be measured using ruler. Current can be measured using Ammeter.<\/li>\n<li><span style=\"font-size: large;\">Current balance located in L01, section B3.<\/span><\/li>\n<li>Power supply, laser, digital scale, ammeter, and tin foil in L35.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Demonstrate force between parallel currents. Using two power supplies, send current through\u00a0both stationary and balancing wires. Angle of mirror connected to pivot will change as wires are pulled together or pushed apart due to Lorentz force. A laser beam, deflected by mirror, can be used to show the otherwise imperceptible change of mirror angle. To &hellip; <a href=\"https:\/\/demos.swarthmore.edu\/physics\/2015\/06\/parallel-currents\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Parallel Currents<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4766,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44,47],"tags":[105,177,232,240,378],"_links":{"self":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3664"}],"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=3664"}],"version-history":[{"count":6,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3664\/revisions"}],"predecessor-version":[{"id":6153,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/posts\/3664\/revisions\/6153"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media\/4766"}],"wp:attachment":[{"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/media?parent=3664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/categories?post=3664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demos.swarthmore.edu\/physics\/wp-json\/wp\/v2\/tags?post=3664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}