1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

RC Network

  1. Oct 15, 2013 #1
    1. The problem statement, all variables and given/known data
    Hey guys, I am having problems with finding the maximum charge of a capacitor.
    From the experiment we are given R=100 Ohms, and Capacitance = 330 uF
    We are asked to find the maximum charge the capacitor has.
    Time to half charge was 0.0235 sec.

    Voltage is 4V

    2. Relevant equations
    Q=Qmax[1−e(−t/RC)]



    3. The attempt at a solution
    I've tried setting Qmax to one and Q to zero to represent a 100 percent but I can't get an answer. I am thinking you can never meet an actual max of a capacitor but I may be wrong.
     
    Last edited: Oct 15, 2013
  2. jcsd
  3. Oct 15, 2013 #2

    gneill

    User Avatar

    Staff: Mentor

    It's likely you weren't measuring the charge (Coulombs) directly. What instrument were you taking measurements with?
     
  4. Oct 15, 2013 #3
    We were given a circuit with a resistor and capacitor. The circuit was then connected to an a ground on one side and a output voltage of 4V. We are asked to find the maximum charge of the experiment. I am thinking I am supposed to calculate the maximum charge using what is given.
     
  5. Oct 15, 2013 #4

    gneill

    User Avatar

    Staff: Mentor

    So you were taking voltage measurements? How is charge related to voltage on a capacitor?
     
  6. Oct 15, 2013 #5
    We had a voltage vs time graph at the end.
    I am thinking this is the formula to find the charge? Q=CV
     
  7. Oct 15, 2013 #6

    gneill

    User Avatar

    Staff: Mentor

    That would be the one! You should be able to find your max Q from your max V since C is a constant.
     
  8. Oct 15, 2013 #7
    Thanks a lot. Sometimes I don't think.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: RC Network
  1. Network Theorems (Replies: 1)

  2. Network Capacitors (Replies: 7)

  3. Capacitor Network (Replies: 3)

Loading...