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What chapters or subject i need to read in order

  1. Jun 5, 2009 #1
    what chapters or subject i need to read in charles A.desour BASIC CIRCUIT THEORY
    order to solve the following question:

    http://i40.tinypic.com/219rsyt.gif
     
  2. jcsd
  3. Jun 5, 2009 #2

    MATLABdude

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    Science Advisor

    You just need to know how to write up the basic differential equation. Doing this in the frequency domain (with a Laplace transform) might make it easier, however.
     
  4. Jun 5, 2009 #3
    i dont know how to get those differential equation.
    i have this desour book
    response to shock
    what that mean??
    i know that delta function is used for sampling a function
    but thats too abstract
    i know kirshgoff laws
    i know differential equation

    i cant figure out the middle part

    if you know this book
    then you can tell what chapter should i read foe this
    ??
     
  5. Jun 6, 2009 #4
    Hi Transgalactic, here is how I'd go about solving the problem:

    Using Kirchoff's current law, write down the first order linear differential equation describing the voltage across the capacitor when shunted by a resistor. Remember that the current from the generator equals the current through the capacitor plus the current through the resistor, and the equations for the current through a capacitor and resistor. After solving the differential equation, you'd have an equation describing the voltage across the capacitor as a function of time. Since Q = CV, if you have an equation describing the voltage across the capacitor as function of time you also have an equation describing the charge on the capacitor as a function of time. In this context I believe what they mean by a "shock input" is that the current goes from zero to some set value in zero time, i.e. the input is not steady state or some function of time like [tex]Asin(\omega t + \varphi)[/tex]. Like MATLABdude said it may be easier to solve equations like this with Laplace transforms instead of grinding through the differential equation, but as I haven't studied them yet you're on your own..:biggrin:
     
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