{"id":152,"date":"2018-07-31T14:09:32","date_gmt":"2018-07-31T18:09:32","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/?post_type=chapter&p=152"},"modified":"2018-12-14T16:10:37","modified_gmt":"2018-12-14T21:10:37","slug":"electromagnetic-induction","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/chapter\/electromagnetic-induction\/","title":{"raw":"Electromagnetic Induction","rendered":"Electromagnetic Induction"},"content":{"raw":"

What is this electromagnetic induction of which you speak?<\/h1>\r\nElectromagnetic induction<\/strong> is when a voltage is created by passing a conductor through a magnetic field.\r\n\r\n[caption id=\"attachment_154\" align=\"aligncenter\" width=\"300\"]\"\" Figure 45. Magnetic poles and induction<\/strong>[\/caption]\r\n\r\nThe size of the voltage can be varied by three factors:\r\n
    \r\n \t
  1. The size of the magnetic field. \u00a0The more flux lines there are, the more flux lines there are for the conductor to cut. \u00a0The strength of flux is directly proportional to the induced voltage.<\/li>\r\n \t
  2. The active length of the conductor. \u00a0Active length meaning the part of the conductor that actually passes through the field. \u00a0The active length is directly proportional to the induced voltage.<\/li>\r\n \t
  3. The speed at which the conductor passes through the field. \u00a0The faster the conductor passed through the field, the greater the voltage induced. \u00a0The speed is directly proportional to the induced voltage.<\/li>\r\n<\/ol>\r\nThese relationships to voltage can be broken into this formula:\u00a0 e = \u03b2lv.\r\n\r\nWhere:\r\n

    e = peak voltage induced in the inductor (volts)<\/p>\r\n

    B = field strength between the poles (Tesla)<\/p>\r\n

    l = active length of conductor (meters)<\/p>\r\n

    v = velocity of the conductor through the field (m\/sec)<\/p>\r\nHere is an example.\r\n\r\nA conductor that has an active length of 4 meters passes through a field of 5 Tesla at a speed of 15 meters per second. \u00a0Determine the peak voltage induced on this conductor.\r\n

    (4 m)(5 T)(15 m\/sec) = 300 volts peak<\/p>\r\nThat's crazy! \u00a0Who discovered that?\r\n\r\nThe discovery of electromagnetic induction is attributed to Michael Faraday who discovered that when he passed a magnetic field through a conductor a current would flow.\r\n\r\nAs long as there was motion between the field and the conductor, a voltage could be induced. \u00a0This could mean the conductor passes through a field or a field passed through a conductor.\r\n\r\nNext up:\u00a0 The alternator<\/strong>","rendered":"

    What is this electromagnetic induction of which you speak?<\/h1>\n

    Electromagnetic induction<\/strong> is when a voltage is created by passing a conductor through a magnetic field.<\/p>\n

    \"\"
    Figure 45. Magnetic poles and induction<\/strong><\/figcaption><\/figure>\n

    The size of the voltage can be varied by three factors:<\/p>\n

      \n
    1. The size of the magnetic field. \u00a0The more flux lines there are, the more flux lines there are for the conductor to cut. \u00a0The strength of flux is directly proportional to the induced voltage.<\/li>\n
    2. The active length of the conductor. \u00a0Active length meaning the part of the conductor that actually passes through the field. \u00a0The active length is directly proportional to the induced voltage.<\/li>\n
    3. The speed at which the conductor passes through the field. \u00a0The faster the conductor passed through the field, the greater the voltage induced. \u00a0The speed is directly proportional to the induced voltage.<\/li>\n<\/ol>\n

      These relationships to voltage can be broken into this formula:\u00a0 e = \u03b2lv.<\/p>\n

      Where:<\/p>\n

      e = peak voltage induced in the inductor (volts)<\/p>\n

      B = field strength between the poles (Tesla)<\/p>\n

      l = active length of conductor (meters)<\/p>\n

      v = velocity of the conductor through the field (m\/sec)<\/p>\n

      Here is an example.<\/p>\n

      A conductor that has an active length of 4 meters passes through a field of 5 Tesla at a speed of 15 meters per second. \u00a0Determine the peak voltage induced on this conductor.<\/p>\n

      (4 m)(5 T)(15 m\/sec) = 300 volts peak<\/p>\n

      That’s crazy! \u00a0Who discovered that?<\/p>\n

      The discovery of electromagnetic induction is attributed to Michael Faraday who discovered that when he passed a magnetic field through a conductor a current would flow.<\/p>\n

      As long as there was motion between the field and the conductor, a voltage could be induced. \u00a0This could mean the conductor passes through a field or a field passed through a conductor.<\/p>\n

      Next up:\u00a0 The alternator<\/strong><\/p>\n","protected":false},"author":422,"menu_order":1,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-152","chapter","type-chapter","status-publish","hentry"],"part":150,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapters\/152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/wp\/v2\/users\/422"}],"version-history":[{"count":17,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapters\/152\/revisions"}],"predecessor-version":[{"id":553,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapters\/152\/revisions\/553"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/parts\/150"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapters\/152\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/wp\/v2\/media?parent=152"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/pressbooks\/v2\/chapter-type?post=152"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/wp\/v2\/contributor?post=152"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/trigforelectricians\/wp-json\/wp\/v2\/license?post=152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}