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Homework Help: First order RC Circuit Table problem

  1. Apr 30, 2014 #1
    1. The problem statement, all variables and given/known data
    Hi I got this problem and have to fill out this table.
    Untitled.png

    4ea18d02-8e1f-4015-9006-64e73a38f53d-original.png

    2. Relevant equations

    node analysis
    time constant = RC
    ic(t)= C dVc(t)/dt


    3. The attempt at a solution

    I got few answers which i worked it out.

    i (0-) = 0

    Vc(0-) = 1.84

    Vr(0-) = i (0-) * 10000

    i (0+) = 0

    Vc(0+) = 3.16

    Vr(0+) = i (0-) * 10000



    Am i right so far?
    I dont know rest of them. the last column i know i have to use node analysis for that.
     
  2. jcsd
  3. Apr 30, 2014 #2

    gneill

    User Avatar

    Staff: Mentor

    The problem description mentions two separate time intervals, a charging interval and a discharging interval. You haven't stated which interval is in play for the determination of the table values.
     
  4. Apr 30, 2014 #3
    I understand but thats what it said... complete table 1.
     
  5. Apr 30, 2014 #4
    I understand but thats what it said... complete table 1.
     
  6. Apr 30, 2014 #5

    gneill

    User Avatar

    Staff: Mentor

    Okay, so pick one of the intervals and state which one you've chosen (somehow I suspect that they want you to fill out the table twice, once for each interval...).

    Hint: Before you make assumptions about Vc(0-) be sure to compare the time constant of the circuit to the given switching interval.
     
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