Problem about second-order circuit

Discussion in 'Homework Help' started by bpmy123, Jun 24, 2015.

  1. bpmy123

    Thread Starter New Member

    Jun 24, 2015
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    0
    [​IMG]
    When t<0,V1 and V2 are voltages of capasistors,when t>0,R3 becomes infinite,find V3(t).

    I can get when t=0+,V3=V1-V2,then I wanna find the V3(t>0).
    I try to use Laplas circuit,but I can't find the equition of V3,Please help.
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    4,788
    Can you derive the equation for the terminal on the left side of the gap?

    Can you derive the equation for the terminal on the right side of the gap?
     
  3. bpmy123

    Thread Starter New Member

    Jun 24, 2015
    6
    0
    I have found the solution,thanks anyway
     
  4. WBahn

    Moderator

    Mar 31, 2012
    17,720
    4,788
    Good. Glad you were able to solve it.
     
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