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What is the difference between an induced emf and a back emf?

  1. Apr 26, 2009 #1
    What is the difference between an induced emf and a back emf?

    (i) i thought they were the same thing??? . . .. .
     
  2. jcsd
  3. Apr 26, 2009 #2

    rl.bhat

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    If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf.
    If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.
     
  4. Apr 26, 2009 #3
    Thank you for clearing that up!!!!
     
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