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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

    www.viethost4u.com/EE.GIF[/URL]

    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(t)=v0*e^(-t/RC)
    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(t)=v0*e^(-t/RC)
    v(0+)= v(0)
    v(infinity)= 0

    are those right ?
     
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