{"id":340,"date":"2023-08-14T20:35:55","date_gmt":"2023-08-15T03:35:55","guid":{"rendered":"https:\/\/dornsife.usc.edu\/lecture-support-lab\/?page_id=340"},"modified":"2023-09-18T12:06:24","modified_gmt":"2023-09-18T19:06:24","slug":"magnetic-field","status":"publish","type":"page","link":"https:\/\/dornsife.usc.edu\/lecture-support-lab\/magnetic-field\/","title":{"rendered":"Magnetic Field"},"content":{"rendered":"\n\n\n\n              \n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--accordions \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--accordions\"\n    \n      >\n\n    \n  \n      <ul>\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-1-DO6VaJSSy0\" aria-controls=\"section-1-1-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(1) &#8211; Magnetic Field<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-1-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-1-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>The magnetic lines of force of a bar magnet and a horse-shoe magnet can be shown by sprinkling iron fillings over them. It is clear and easily visible by the whole class when done on the overhead projector. Place the permanent magnets under a thin plexiglas&#8217;s plate (to avoid having the iron fillings stuck to the magnets nor to the projector) and sprinkle iron fillings lightly. The iron fillings align themselves with the magnetic field.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-346 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mg1.jpg\" alt=\"Magnetic Field\" width=\"307\" height=\"307\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mg1.jpg 307w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mg1-300x300.jpg 300w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mg1-150x150.jpg 150w\" sizes=\"(max-width: 307px) 100vw, 307px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-2-DO6VaJSSy0\" aria-controls=\"section-1-2-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\"> MG.1(2a) &#8211; Magnetic Field Demonstrator<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-2-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-2-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This experiment demonstrates the three dimensional field lines of a magnetic bar. The three dimensional cube contains some liquid and iron powders in it. The iron powder can move freely in the cube. A hole in the middle of the cube allows us to insert a magnetic bar. When the magnetic bar is inserted, the iron powder will show the magnetic field lines inside the cube due to the magnetic bar.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-343 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/magfield_demo.jpg\" alt=\"Magnetic Field\" width=\"700\" height=\"500\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/magfield_demo.jpg 700w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/magfield_demo-300x214.jpg 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-3-DO6VaJSSy0\" aria-controls=\"section-1-3-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(2b) &#8211; 3-D Magnetic Field Demonstrator<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-3-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-3-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This clear plastic case makes it possible to observe a magnetic field in 3-D.Each side of the field demonstrator contains iron filings, and the center of the demonstrator houses a powerful magnet. The demonstrator can open down the center, making it possible to view the magnetic field from all angles.<\/p>\n<p>Click <a href=\"\/lecture-support-lab\/3d-magnetic-lines\/\">here<\/a> to see a video clip of this demo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-341\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/3-D-Magnetic-Field-Demonstrator-300x240.jpg\" alt=\"Magnetic Field\" width=\"300\" height=\"240\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/3-D-Magnetic-Field-Demonstrator-300x240.jpg 300w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/3-D-Magnetic-Field-Demonstrator.jpg 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-4-DO6VaJSSy0\" aria-controls=\"section-1-4-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(3) &#8211; 3D Magnetic Domain Models<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-4-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-4-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This demonstrates the three dimensional field line of a magnetic bar. Two type of magnets is used for this demo. One is the pole magnet and the other is a horseshoe magnet. Each has cross sectional planes with compass needles that shows the direction of the magnets field lines.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-344 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.13.jpg\" alt=\"Magnetic Field\" width=\"500\" height=\"458\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.13.jpg 500w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.13-300x275.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-5-DO6VaJSSy0\" aria-controls=\"section-1-5-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(4) &#8211; Neodymium Magnets<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-5-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-5-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Neodymium is one of the most powerful magnet materials of the world and has high resistance to demagnization.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-347 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/neomags.jpg\" alt=\"Magnetic Field\" width=\"300\" height=\"268\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-6-DO6VaJSSy0\" aria-controls=\"section-1-6-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(5) &#8211; Ferrofluids<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-6-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-6-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Ferrofluid is an incredible substance which is in liquid form until a strong magnetic field is brought near it. As the magnet comes closer to the ferrofluid, spikes begin to rise from it. Ferrofluid, a colloid with magnetic nanoparticles suspended in an oil base, was originally discovered by NASA scientists. Now ferrofluids are used to make rotating seals in high vacuum equipment and can be even found in high-end speakers.<\/p>\n<p>Click <a href=\"\/lecture-support-lab\/ferrofluids\/\">here<\/a> to see a video of this demo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-342 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/ff2.jpg\" alt=\"Magnetic Field\" width=\"400\" height=\"300\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/ff2.jpg 400w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/ff2-300x225.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-7-DO6VaJSSy0\" aria-controls=\"section-1-7-DO6VaJSSy0\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MG.1(6) &#8211; Thinking Putty<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-7-DO6VaJSSy0\" role=\"region\" aria-labelledby=\"heading-1-7-DO6VaJSSy0\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This material has millions of tiny micron-sized magnets that are embedded in each handful of thinking putty. Use the included super-strong ceramic magnet to control the putty like a snake charmer. Or &#8220;charge&#8221; the blob of putty so it can become a magnet of its own and pick up small tacks and paperclips.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-345 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.16.jpg\" alt=\"Magnetic Field\" width=\"500\" height=\"301\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.16.jpg 500w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MG.16-300x181.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n          <\/ul>\n  \n  \n\n  <\/div><\/div>\n\n\n\n  \n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--two-column-ctas \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--two-column-ctas\"\n    \n      >\n\n    \n      <div class=\"group\">\n\n                  \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Back to Magnetostatics\n      <\/h2>\n\n\n<\/div>\n      \n              <ul>\n                      <li>\n                  \n<div class=\"f--field f--link\">\n\n    \n    \n  \n<a \n  class=\"link\"\n  href= https:\/\/dornsife.usc.edu\/lecture-support-lab\/magnetostatics\/\n    aria-label=\"Read more about Magnetostatics\"  \n>\n    Magnetostatics \n  <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" width=\"25\" height=\"25\" xml:space=\"preserve\"><polygon fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000\" points=\"19.3,27.5 29.3,17.5,19.3,7.5 16.3,10.4 21.4,15.4 6.7,15.4 6.7,19.6 21.4,19.6 16.3,24.6 \"\/><\/svg>\n<\/a>\n\n\n<\/div>\n            <\/li>\n                  <\/ul>\n      \n    <\/div>\n      <div class=\"group\">\n\n                  \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Back to Electromagnetism\n      <\/h2>\n\n\n<\/div>\n      \n              <ul>\n                      <li>\n                  \n<div class=\"f--field f--link\">\n\n    \n    \n  \n<a \n  class=\"link\"\n  href= https:\/\/dornsife.usc.edu\/lecture-support-lab\/electromagnetism\/\n    aria-label=\"Read more about Electromagnetism\"  \n>\n    Electromagnetism \n  <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" width=\"25\" height=\"25\" xml:space=\"preserve\"><polygon fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000\" points=\"19.3,27.5 29.3,17.5,19.3,7.5 16.3,10.4 21.4,15.4 6.7,15.4 6.7,19.6 21.4,19.6 16.3,24.6 \"\/><\/svg>\n<\/a>\n\n\n<\/div>\n            <\/li>\n                  <\/ul>\n      \n    <\/div>\n  \n\n  <\/div><\/div>\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--spacer \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--spacer\"\n    \n      >\n\n    \n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":354,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-content-detail.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-340","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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