{"id":664644,"date":"2023-07-14T11:01:38","date_gmt":"2023-07-14T05:31:38","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=664644"},"modified":"2025-04-28T13:11:33","modified_gmt":"2025-04-28T07:41:33","slug":"faradays-law-2","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/","title":{"rendered":"Faraday&#8217;s law"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Currents_produce_magnetism\" title=\"Currents produce magnetism\">Currents produce magnetism<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Faradays_laws_of_electromagnetic_Induction\" title=\"Faraday\u2019s laws of electromagnetic Induction\">Faraday\u2019s laws of electromagnetic Induction<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Magnetic_Field_lines\" title=\"Magnetic Field lines\">Magnetic Field lines<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Magnetic_Flux\" title=\"Magnetic Flux:\">Magnetic Flux:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Electromotive_force\" title=\"Electromotive force: \">Electromotive force: <\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Now_we_come_to_defining_Faradays_laws_of_electromagnetic_Induction\" title=\"Now we come to defining Faraday\u2019s laws of electromagnetic Induction\">Now we come to defining Faraday\u2019s laws of electromagnetic Induction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Faradays_second_law_of_electromagnetic_Induction\" title=\"Faraday\u2019s second law of electromagnetic Induction\">Faraday\u2019s second law of electromagnetic Induction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Applications_of_electromagnetic_Induction\" title=\"Applications of electromagnetic Induction\">Applications of electromagnetic Induction<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Frequently_Asked_Questions_on_Faradays_law\" title=\"Frequently Asked Questions on Faraday&#8217;s law\">Frequently Asked Questions on Faraday&#8217;s law<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#State_Faradays_first_law_of_electromagnetic_Induction\" title=\"State Faraday\u2019s first law of electromagnetic Induction? \">State Faraday\u2019s first law of electromagnetic Induction? <\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#State_Faradays_second_law_of_electromagnetic_Induction\" title=\"State Faraday\u2019s second law of electromagnetic Induction? \">State Faraday\u2019s second law of electromagnetic Induction? <\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#Which_law_gives_the_direction_of_induced_emf_in_a_coil\" title=\"Which law gives the direction of induced emf in a coil? \">Which law gives the direction of induced emf in a coil? <\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/infinitylearn.com\/surge\/articles\/faradays-law\/#When_a_magnet_is_pushed_towards_a_coil_on_what_factors_does_the_magnitude_of_induced_emf_in_the_coil_depend_on\" title=\"When a magnet is pushed towards a coil, on what factors does the magnitude of induced emf in the coil depend on? \">When a magnet is pushed towards a coil, on what factors does the magnitude of induced emf in the coil depend on? <\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>For long time in history, phenomena of electricity and magnetism were considered separate and unrelated. But in last 200 years, things have changed tremendously, and now we duly regard electricity and magnetism having a common source. Several experiments demonstrate that electricity and magnetism are interrelated.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Currents_produce_magnetism\"><\/span>Currents produce magnetism<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Oersted discovered that when a current was passed through a wire, a magnetic needle placed in its vicinity deflected. He knew magnets could deflect magnetic needles. But his observation proved yet another thing: that currents (charges in motion) also produce magnetic fields that deflect magnetic needles. It means a current-carrying wire is a virtual magnet.<\/p>\n<p>Nature is more mysterious and fascinating than we think, right from common man to scientists!&#8230; Even the converse effect to the one described above is available in nature! And what is that??!!<\/p>\n<ul>\n<li>Moving magnets produce currents, or<\/li>\n<li>Moving conducting loops in magnetic regions develop currents<\/li>\n<\/ul>\n<p>So, if we see,<\/p>\n<ul>\n<li>Moving charges produce magnetism<\/li>\n<li>Moving magnets produce electricity.<\/li>\n<\/ul>\n<p><strong>So, electricity and magnetism are deeply interrelated!!<\/strong><\/p>\n<p>The phenomenon of producing electricity using moving magnets or by moving conducting loops in magnetic regions is called electromagnetic Induction.<\/p>\n<p>Do you know, it is using electromagnetic induction, electricity that enters our homes is produced hundreds and thousands of kilometres away from our homes, before it is directed to move towards our cities, homes and industries.<\/p>\n<p>You can do the following experiment at home to get convinced about the phenomenon of electromagnetic induction.<\/p>\n<p>We know normally to light a torch bulb you need a battery.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-664645\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/light-a-torch-bulb.png\" alt=\"light a torch bulb\" width=\"183\" height=\"168\" \/><\/p>\n<p>Now make the following simple circuit.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-664646\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/torch-bulb-conducting-wire-247x300.png\" alt=\"torch bulb conducting wire\" width=\"247\" height=\"300\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/torch-bulb-conducting-wire-247x300.png 247w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/torch-bulb-conducting-wire.png 250w\" sizes=\"(max-width: 247px) 100vw, 247px\" \/><\/p>\n<p>Take a moderately powerful magnet and bring it fast to the closed loop of torch bulb and conducting wires. You will find that:<\/p>\n<ul>\n<li>As you bring the magnet closer, the bulb lights up.<\/li>\n<li>But you will also find that when you stop the magnet, the bulb doesn\u2019t glow.<\/li>\n<li>Also, if you take the magnet away from the loop, the magnet lights up again and when you stop the magnet, the bulb stops glowing.<\/li>\n<li>Further, the faster you move the magnet (away from or towards the coil), the brighter it glows.<\/li>\n<\/ul>\n<p>This goes on to prove that moving magnets do produce currents.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-664647 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/Michael-Faraday.png\" alt=\"Michael Faraday\" width=\"340\" height=\"415\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/Michael-Faraday.png 340w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/Michael-Faraday-246x300.png 246w\" sizes=\"(max-width: 340px) 100vw, 340px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Faradays_laws_of_electromagnetic_Induction\"><\/span>Faraday\u2019s laws of electromagnetic Induction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Through his investigations on the experiments of electromagnetic induction, Faraday came up with two laws.<\/p>\n<p>Before we dwell deep and try to understand these laws, we must become familiar with physical quantities referred in these laws.<\/p>\n<ul>\n<li>\n<h4><span class=\"ez-toc-section\" id=\"Magnetic_Field_lines\"><\/span><strong>Magnetic Field lines<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Consider a region where magnetic field is present. For this, you can imagine region surrounding a magnet. We know magnets have influence in the region around them. At every point in this region, there is a definite value of magnetic force on the magnetic needle in a definite direction. If we plot these forces as small lines, with arrows on them indicating directions of forces (essentially vectors) then we get continuous curves. By this method, we basically try to visualize the magnetic influence of a magnet. The credit for this powerful picturization of magnetic field using these lines, which are actually imaginary, goes to Michael Faraday. Two important properties of these lines are:<\/li>\n<li>The direction of magnetic field line at a particular point gives the direction magnetic force on the north pole of the magnetic needle kept at that point.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-664648\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/magnetic-field.png\" alt=\"magnetic field\" width=\"298\" height=\"192\" \/><\/p>\n<ul>\n<li>The density of magnetic field lines (number of magnetic field lines per unit area) is a measure of the strength of magnetic effect at that point.<\/li>\n<\/ul>\n<p>In the adjacent figure, as depicted by density of magnetic field lines, the magnetic field is far more stronger near the poles of the magnet than around the central regions of the magnet.<\/p>\n<ul>\n<li>\n<h4><span class=\"ez-toc-section\" id=\"Magnetic_Flux\"><\/span><strong>Magnetic Flux:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Within the region of magnetic field, consider a small imaginary area of any arbitrary shape. Clearly magnetic field lines pass through it. For simplicity, let these lines be perpendicular to the surface. Magnetic flux is said to be linked with this surface. It is defined as <em><strong>\u00d8 = (Magnetic field) x (area)<\/strong><\/em> Its SI unit is weber.<\/li>\n<li>\n<h4><strong>Electromotive force: <\/strong><\/h4>\n<p>The electrical potential difference across two points of a circuit that drives current through the circuit.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Now_we_come_to_defining_Faradays_laws_of_electromagnetic_Induction\"><\/span>Now we come to defining Faraday\u2019s laws of electromagnetic Induction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As was said earlier, there are two laws, given by Faraday, for describing the phenomenon of electromagnetic induction.<\/p>\n<p><strong>Faraday\u2019s first law of electromagnetic Induction:<\/strong> According to this law, whenever there is a change in magnetic flux linked with a coil kept in a magnetic field, an emf is induced in the coil.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-664649 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/electromagnetic-induction.png\" alt=\"electromagnetic induction\" width=\"886\" height=\"211\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/electromagnetic-induction.png 886w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/electromagnetic-induction-300x71.png 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2023\/07\/electromagnetic-induction-768x183.png 768w\" sizes=\"(max-width: 886px) 100vw, 886px\" \/><\/p>\n<p>In the first diagram, the magnet and coil are both fixed. With each turn of the coil, there is a certain value of magnetic field due to the magnet. The farther a particular turn is from the magnet, the smaller is the strength of magnetic field at the location of the turn.<\/p>\n<p>Hence, the strength of magnetic field is different for different turns of the coil. The product<\/p>\n<p><em><strong>Magnetic flux  = (Magnetic field)(area)<\/strong><\/em> is different for different turns of the coil.<\/p>\n<p>If we sum up magnetic flux lined with all the turns, we get total magnetic flux linked with all the turns of the coil.<\/p>\n<p>In the second figure, we move the magnet towards the coil. Doing this clearly increases the total magnetic flux linked with the coil.<\/p>\n<p><em><strong>\u00d8 = (Magnetic field) x (area of coil)<\/strong><\/em><\/p>\n<p>Faraday\u2019s first law says that by moving the magnet, since you have changed the magnetic flux linked with the coil, an emf will be induced in the coil. This emf drives current through the coil.<\/p>\n<p>Consider a case if we moved both the coil and the magnet towards, say right, with the same speed. In that case magnetic flux lined with the coil will remain same. Hence no emf will be induced in the coil.<\/p>\n<p><a href=\"https:\/\/infinitylearn.com\/surge\/articles\/physics-articles\"><button class=\"btn btn-dark mx-2 my-2 px-4\" style=\"border-radius: 50px;\" type=\"button\">Physics Articles<\/button><\/a> <a href=\"https:\/\/infinitylearn.com\/surge\/formulas\/physics-formulas\"><button class=\"btn btn-dark mx-2 my-2 px-4\" style=\"border-radius: 50px;\" type=\"button\">Physics Formulas<\/button><\/a> <a href=\"https:\/\/infinitylearn.com\/surge\/articles\/vernier-calipers\/\"><button class=\"btn btn-dark mx-2 my-2 px-4\" style=\"border-radius: 50px;\" type=\"button\">Vernier Calipers<\/button><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Faradays_second_law_of_electromagnetic_Induction\"><\/span>Faraday\u2019s second law of electromagnetic Induction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Second law quantifies the induced emf.<\/p>\n<p>It states that induced emf in the coil is equal to the rate of change of magnetic flux linked with the circuit.<\/p>\n<p>If there are <em><strong>N<\/strong><\/em> turns of a coil, each linked with magnetic flux <em><strong>\u00d8<\/strong><\/em>, then total magnetic flux lined with the coil is <em><strong>N\u00d8<\/strong><\/em>.<\/p>\n<p>Induced emf, <em><strong>e = &#8211; d\/dt(N\u00d8) = &#8211; N x d\u00d8\/dt<\/strong><\/em><\/p>\n<p><em><strong>d\u00d8 <\/strong><\/em>is the change in magnetic flux linked with a single turn of the coil in time <em><strong>dt<\/strong><\/em>.<\/p>\n<p>Clearly, <strong>e \u221d <em>d\u00d8\/dt<\/em><\/strong> . It means by moving the magnet faster, <em><strong>d\u00d8\/dt<\/strong><\/em> will be greater, hence induced emf will also be larger.<\/p>\n<p><strong>Significance of negative sign in the equation and Lenz\u2019s law<\/strong>: Negative sign indicates that direction of induced emf is such that it opposes the very cause responsible for the generation of induced emf. This implies that the magnetic field generated by the induced current will repel the incoming magnet.<\/p>\n<p>On the other hand, if the magnet were to be moved away from the coil, the magnetic field of induced current would try to attract the magnet.<\/p>\n<p>So, the direction of induced emf is such that it opposes the very cause that is responsible for the generation of induced emf. This is the statement of <strong>Lenz\u2019s law.<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Applications_of_electromagnetic_Induction\"><\/span>Applications of electromagnetic Induction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Transformers, induction cookers, electric generators, Brakes (electromagnetic damping), induction motors..<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_on_Faradays_law\"><\/span>Frequently Asked Questions on Faraday&#8217;s law<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"State_Faradays_first_law_of_electromagnetic_Induction\"><\/span>State Faraday\u2019s first law of electromagnetic Induction? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tWhenever there is a change in magnetic flux linked with a coil, an emf is induced in the coil. \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"State_Faradays_second_law_of_electromagnetic_Induction\"><\/span>State Faraday\u2019s second law of electromagnetic Induction? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe amount of induced emf in a coil is equal to the rate of change of magnetic flux linked with the coil.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Which_law_gives_the_direction_of_induced_emf_in_a_coil\"><\/span>Which law gives the direction of induced emf in a coil? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tLenz\u2019s law gives the direction of induced emf in a coil. As per Lenz\u2019s law, the direction of induced emf is such that it opposes the very cause that is responsible for its generation. \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"When_a_magnet_is_pushed_towards_a_coil_on_what_factors_does_the_magnitude_of_induced_emf_in_the_coil_depend_on\"><\/span>When a magnet is pushed towards a coil, on what factors does the magnitude of induced emf in the coil depend on? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe magnitude of induced emf depends on the number of turns of the coil, area of the coil, strength of the magnet and also how fast was the magnet pushed towards the coil. \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"State Faraday\u2019s first law of electromagnetic Induction? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Whenever there is a change in magnetic flux linked with a coil, an emf is induced in the coil.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"State Faraday\u2019s second law of electromagnetic Induction? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The amount of induced emf in a coil is equal to the rate of change of magnetic flux linked with the coil.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Which law gives the direction of induced emf in a coil? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Lenz\u2019s law gives the direction of induced emf in a coil. As per Lenz\u2019s law, the direction of induced emf is such that it opposes the very cause that is responsible for its generation.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"When a magnet is pushed towards a coil, on what factors does the magnitude of induced emf in the coil depend on? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The magnitude of induced emf depends on the number of turns of the coil, area of the coil, strength of the magnet and also how fast was the magnet pushed towards the coil.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t\t\t]\n\t}\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>For long time in history, phenomena of electricity and magnetism were considered separate and unrelated. But in last 200 years, [&hellip;]<\/p>\n","protected":false},"author":53,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Faraday's law","_yoast_wpseo_title":"Faraday's Laws of Electromagnetic Induction - First and Second Law","_yoast_wpseo_metadesc":"Faraday's First Law and its impact on electromagnetism. Faraday's First Law states that a change in a magnetic field through a circuit creates an electric current.","custom_permalink":"articles\/faradays-law\/"},"categories":[8442,8444],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Faraday&#039;s Laws of Electromagnetic Induction - First and Second Law<\/title>\n<meta name=\"description\" content=\"Faraday&#039;s First Law and its impact on electromagnetism. 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