{"id":375,"date":"2022-03-12T19:07:07","date_gmt":"2022-03-12T19:07:07","guid":{"rendered":"https:\/\/2022.robocupjunior.eu\/rcj\/?page_id=375"},"modified":"2022-05-31T17:49:11","modified_gmt":"2022-05-31T17:49:11","slug":"magnetism-on-a-table","status":"publish","type":"page","link":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/workshops\/magnetism\/magnetism-on-a-table\/","title":{"rendered":"Magnetism on a Table"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\"><figure class=\"wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magneticField2.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magneticField2.jpg 1024w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magneticField2-300x225.jpg 300w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magneticField2-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;flex-basis:20%\">\n<!-- START Kaya QR Code Generator --><div class=\"wpkqcg_qrcode_wrapper\"><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68_ecclevel\" value=\"L\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68_size\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68_color\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68_bgcolor\" value=\"\" \/><input type=\"hidden\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68_content\" value=\"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/375\" \/><img decoding=\"async\" src=\"\" id=\"wpkqcg_qrcode_outputimg_9769d6e580c2b4a68\" alt=\"QR Code\" class=\"wpkqcg_qrcode\" style=\"width: auto; height: auto; max-width: 100%;\" ><div style=\"clear: none;\"><\/div><\/div><!-- END Kaya QR Code Generator -->\n<\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-post-title\">Magnetism on a Table<\/h2>\n\n\n<p>A magnet has two poles: a north and a south pole. Like poles repel each other, whereas opposite poles attract each other. Magnetic fields are used by electromagnets, motors, bells, and compasses.<\/p>\n\n\n\n<p><strong>Components:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>iron filings<\/li><li>magnet<\/li><li>paper<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Working-Principle:\">Working Principle:<\/h2>\n\n\n\n<p>A magnetic field is created by a magnet. A magnetic field is invisible, yet its effects can be observed. When a magnetic material is placed in a magnetic field, it is subjected to a force. Because the magnet and the material do not have to touch, the force is a non-contact force.<\/p>\n\n\n\n<p><strong>Visualising magnetic fields<\/strong><\/p>\n\n\n\n<p>A plotting compass or iron filings can be used to detect a magnetic field:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magField.jpg\" alt=\"\" class=\"wp-image-376\" width=\"504\" height=\"284\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magField.jpg 1008w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magField-300x169.jpg 300w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/magField-768x432.jpg 768w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/figure>\n\n\n\n<p>The magnetic field around this bar magnet is depicted by iron filings.<\/p>\n\n\n\n<p><strong>Magnetic field diagrams<\/strong><\/p>\n\n\n\n<p>Because drawing the results of an experiment like the one seen in the photo would be challenging, we instead draw simple magnetic field lines.<\/p>\n\n\n\n<p>Take note of the following in the diagram:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa2.png\" alt=\"\" class=\"wp-image-378\" width=\"468\" height=\"264\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa2.png 624w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa2-300x169.png 300w\" sizes=\"auto, (max-width: 468px) 100vw, 468px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><li>There is an arrowhead on each field line.<\/li><li>The field lines are drawn from the north pole to the south pole.<\/li><li>At the poles, the field lines are more dense.<\/li><li>At the poles, where the field lines are most concentrated, the magnetic field is strongest.<\/li><\/ul>\n\n\n\n<p>Field lines also demonstrate what happens to two magnets&#8217; magnetic fields when they attract or repel one other.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa4.png\" alt=\"\" class=\"wp-image-379\" width=\"468\" height=\"401\" srcset=\"https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa4.png 624w, https:\/\/2022.robocupjunior.eu\/rcj\/wp-content\/uploads\/2022\/03\/MagnetismoMesa4-300x257.png 300w\" sizes=\"auto, (max-width: 468px) 100vw, 468px\" \/><\/figure>\n\n\n\n<p>When two magnets attract each other, field lines run from one to the other. When two magnets repel each other, field lines do not lead from one to the other.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Instructions:\">Instructions:<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>Cover a magnet with a sheet of paper or transparent surface (this stops the iron filings sticking to the magnet)<\/li><li>Strew iron particles across the surface<\/li><li>Tap the surface lightly to spread the filings out.<\/li><li>Watch and keep track of the outcomes<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Links:.1\">Links:<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=H6ySpdkK6Fg\">How to visualize magnetic field lines [Ask Fausto #2]<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.bbc.co.uk\/bitesize\/guides\/z3g8d2p\/revision\/2\">Magnetic fields &#8211; Electromagnetism and magnetism &#8211; KS3 Physics Revision &#8211; BBC Bitesize<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A magnet has two poles: a north and a south pole. Like poles repel each other, whereas opposite poles attract each other. Magnetic fields are used by electromagnets, motors, bells, and compasses. Components: iron filings magnet paper Working Principle: A magnetic field is created by a magnet. A magnetic field is invisible, yet its effects [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":377,"parent":237,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-375","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/comments?post=375"}],"version-history":[{"count":7,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/375\/revisions"}],"predecessor-version":[{"id":958,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/375\/revisions\/958"}],"up":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/pages\/237"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/media\/377"}],"wp:attachment":[{"href":"https:\/\/2022.robocupjunior.eu\/rcj\/index.php\/wp-json\/wp\/v2\/media?parent=375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}