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Integral reason question

  1. Aug 27, 2009 #1
    why they integrate in from 0 till I in order to find the energy on the inductor

    http://i27.tinypic.com/11rfbyf.jpg
     
  2. jcsd
  3. Aug 27, 2009 #2

    rock.freak667

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    I'd think because as you turn on the circuit, the current through the conductor rises from 0 until it reaches the set current I, so the limits are from 0 to I.
     
  4. Aug 27, 2009 #3
    look in this example
    http://i28.tinypic.com/2h3ykxx.jpg
    here they pick intervals as time (not current like in the first example)
    why??
     
  5. Aug 27, 2009 #4

    rock.freak667

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    because they are integrating with respect to time, so the limits must be associated with time. If they were integrating with respect to I, then they'd need limits associated with the current.
     
  6. Aug 28, 2009 #5
    why in the first case they integrate with respect to current
    and in the second with respect to time

    those cases should be calculated in the same way
    ??
     
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