{"id":159,"date":"2022-10-20T15:26:12","date_gmt":"2022-10-20T15:26:12","guid":{"rendered":"https:\/\/successrouter.com\/articles\/?p=159"},"modified":"2022-10-22T18:16:55","modified_gmt":"2022-10-22T18:16:55","slug":"laws-of-electromagnetic-induction","status":"publish","type":"post","link":"https:\/\/successrouter.com\/articles\/laws-of-electromagnetic-induction\/","title":{"rendered":"Laws of Electromagnetic Induction"},"content":{"rendered":"<h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#a-faradays-laws-of-electromagnetic-induction\">A. Faraday&#8217;s laws of electromagnetic induction:<\/a><\/li>\n<li><a href=\"#first-law\">First Law<\/a><\/li>\n<li><a href=\"#second-law\">Second law:<\/a><\/li>\n<li><a href=\"#b-third-law-or-lenzs-law\">B. Third Law or Lenz&#8217;s law:<\/a><\/li>\n<li><a href=\"#mathematical-form-of-the-laws-of-electromagnetic-induction\">Mathematical form of the laws of electromagnetic induction:<\/a><\/li><\/ul>\n\n\n<p>There are two types of laws which govern the phenomenon of electromagnetic induction:<\/p>\n\n\n\n<p>A. Faraday&#8217;s laws which give us the magnitude of induced emf.<\/p>\n\n\n\n<p>B. Lenz&#8217;s law which gives us the direction of induced emf.<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"a-faradays-laws-of-electromagnetic-induction\">A. Faraday&#8217;s laws of electromagnetic induction:<\/h4>\n\n\n<p>These can be stated as follows:<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"first-law\">First Law<\/h4>\n\n\n<p>Whenever the magnetic flux linked with a closed-circuit change, an emf (and hence a current) is induced in it which lasts only so long as the change in flux is taking place. This phenomenon is called <strong><em>electromagnetic induction.<\/em><\/strong><\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"second-law\">Second law:<\/h4>\n\n\n<p>The magnitude of the induced emf is equal to the rate of change of magnetic flux linked with the closed circuit. Mathematically,<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>|\u03b5| = d\u00f8\/dt<\/strong><\/p>\n\n\n<h4 class=\"has-medium-font-size wp-block-heading\" id=\"b-third-law-or-lenzs-law\">B. Third Law or Lenz&#8217;s law:<\/h4>\n\n\n<p>This law states that the direction of induced current is such that it opposes the cause which produces it, i.e., it opposes the change in magnetic flux.<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"mathematical-form-of-the-laws-of-electromagnetic-induction\">Mathematical form of the laws of electromagnetic induction: <\/h4>\n\n\n<p>Expression for induced emf. According to the Faraday&#8217;s flux rule,<\/p>\n\n\n\n<p>Magnitude of induced emf<\/p>\n\n\n\n<p>= Rate of change of magnetic flux<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>|\u03b5| = d\u00f8\/dt<\/strong><\/p>\n\n\n\n<p>Taking into account Lenz&#8217;s rule for the direction of induced emf, Faraday&#8217;s law takes the form:<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u03b5 = &#8211; d\u00f8\/dt<\/strong><\/p>\n\n\n\n<p>The negative sign indicates that the direction of induced emf is such that it opposes the change in magnetic flux.<\/p>\n\n\n\n<p>If the coil consists of N tightly wound turns, then the emfs developed in all these turns will be equal and in the same direction and hence get added up. Total induced emf will be<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u03b5 = &#8211; N. (d\u00f8\/dt)<\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>There are two types of laws which govern the phenomenon of electromagnetic induction: A. Faraday&#8217;s laws which give us the magnitude of induced emf. B. Lenz&#8217;s law which gives us the direction of induced emf. A. Faraday&#8217;s laws of electromagnetic induction: These can be stated as follows: First Law Whenever the magnetic flux linked with &#8230; <a title=\"Laws of Electromagnetic Induction\" class=\"read-more\" href=\"https:\/\/successrouter.com\/articles\/laws-of-electromagnetic-induction\/\" aria-label=\"More on Laws of Electromagnetic Induction\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/posts\/159"}],"collection":[{"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/comments?post=159"}],"version-history":[{"count":3,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/posts\/159\/revisions"}],"predecessor-version":[{"id":194,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/posts\/159\/revisions\/194"}],"wp:attachment":[{"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/media?parent=159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/categories?post=159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/successrouter.com\/articles\/wp-json\/wp\/v2\/tags?post=159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}