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Homework Help: Sketch 3 µF capacitor

  1. Oct 1, 2007 #1
    Hey everybody, I hope that you can help me with this question:

    The current through a 3 µF capacitor is shown in the figur:

    http://peecee.dk/?id=70914

    At t=0, the voltage is v(0)=10. Sketch the voltage, power, and stored energy to scale versus time.

    - I will start to find the voltage. To find the voltage I have to use this formula:

    q=c*v

    is it tru????
     
  2. jcsd
  3. Oct 1, 2007 #2

    berkeman

    User Avatar

    Staff: Mentor

    Try using the following equation instead:

    i = C dV/dt

    You have the i(t) waveform, and you are given V(t=0). How can you manipulate the above equation to get the equation for the voltage V(t)? Plot V(t), then plot E(t), and from that, you can plot the power P(t).
     
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