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Homework Help: RC Circuits

  1. Aug 9, 2005 #1
    I've been set the following assignment on RC circuits that I thought I understood. Turns out I don't:

    http://www.geocities.com/danielessex/images/electronicsmain.jpg

    I understand what is happening in the circuit and what it is asking me to do but I don't really know how to go about it.

    When i transposed the charging formula i got:
    t=ln(1-Vc/V0)x-RC

    When i transposed the discharging formula i got:
    t=ln(Vc/V0)xRC

    Not really sure if these are correct but if they are, how do I go about calculating the theoretical charge and discharge times when I don't know Vc

    I might just be being stupid but Maths and Physics were never my strong points so any help would be much appreciated (or if you wanna do the assignment I wouldnt mind ;P)

    Thanks for you time and help,
    Dan - Edinburgh, Scotland
     

    Attached Files:

  2. jcsd
  3. Aug 15, 2005 #2
    Just like to say thanks for the 'overwhelming' response from you all.!

    Thanks a bunch!
     
  4. Aug 15, 2005 #3
    well, i'm not sure about everyone else, but the document in your first link is unreadable on my computer.
     
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