response type problem

Discussion in 'Homework Help' started by braddy, Aug 25, 2007.

  1. braddy

    Thread Starter Well-Known Member

    Dec 29, 2004
    83
    0
    Hi,
    I have problem doing this problem:
    It is the problem #5 on the attachment.( I was not able to remove problem#4)

    Please can you give me some guidance?
    I know that for t>0( steady state) the inductor is like a short and the capacitor like an open circuit.

    Do I need to replace the inductor by a short and cancel the part with the capacitor and then do a KVL and solve for V(t)?

    Thank you
    B
     
  2. recca02

    Senior Member

    Apr 2, 2007
    1,211
    0
    tell me is t>o a time between 0 and infinity (i;e where the circuits functions properly or is it the moment just after the closure of the switch (i have not kept touch with this for a long time now)
    since u mention steady state probably the first assumption is correct.
    IIRC in that case u should not open or short anything just solve with initial conditions which should be voltage across capacitor.
     
  3. braddy

    Thread Starter Well-Known Member

    Dec 29, 2004
    83
    0
    I think it is the 0 to infinity.
    However, I was wondering if I need to study the case just before the switch closes.

    Still vague.
    B
     
  4. recca02

    Senior Member

    Apr 2, 2007
    1,211
    0
    yes the initial condition of the circuit comes into effect.
    b4 closure there wud have been some voltage across cap u will need to take this into consideration.
    but u dont need to modify the crkt (no short and open reqd-the components remain as they are)
    u only need to write the v(T) using KVL for this circuit.
     
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