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Homework Help: Please with circuit , thanks first

  1. Oct 12, 2004 #1
    hi everyone

    can someone helps me out this proplem? just tell me which to start, i'm totally dont undestand this proplem

    here is the link


    sorry about the picture too big (79kb) ,i can't upload up here
    Last edited by a moderator: Apr 21, 2017
  2. jcsd
  3. Oct 13, 2004 #2
    Herer what i did :
    Case 1
    i(t)= (v0/R)*e^(t/R*C)
    i(0)= vo/R
    i(infinity)= 0

    Case 2
    v(0+)= v(0)
    v(infinity)= 0

    Case 3
    i(t)= -C*(dv/dt)= -C* d(v0*e^(t/R*C))/dt
    i(0)= -C*d(v0)/dt
    i(infinity)= 0

    Case 4
    v(0+)= v(0)
    v(infinity)= 0

    are those right ?
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