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Problem in auto induction .

  1. Apr 3, 2007 #1
    1. The problem statement, all variables and given/known data
    i tried to put all data in the image .


    in the initial situation K was closed.in T = 0 ,K was opened.

    give the differenciel equation of the courant.

    3. The attempt at a solution

    (R+r)*i + L (di)/(dt) = 0 .

    my problem is that i don't know if we have to put (R+r)*i or only r*i in the differentiel equation of the courant .

    thanks in advance for any help.
  2. jcsd
  3. Apr 3, 2007 #2
    by the way,if there is something not clear in the data of the problem ,i will be happy to explain it.
  4. Apr 3, 2007 #3
    does nobody know the solution?
  5. Apr 4, 2007 #4
    no answer !!:(
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