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!

Capacitor Discharge

  1. Oct 16, 2009 #1
    1. The problem statement, all variables and given/known data
    A capacitor is charged to 1 coulomb; the capacitance is 6.00×10-5 farads. Then a switch is closed which puts the capacitor in a closed circuit with a resistor; the resistance is 9.20×10^1 ohms. Calculate the charge on the capacitor after 4.00 milliseconds. (1 ms = 0.001 s)



    2. Relevant equations
    I=V/R
    C=Q/V


    3. The attempt at a solution
    Final charge=1 Coulomb * 1.602E-19-.004/(92*6E-5)

    1.602E(2.71828)^.004/(92*6E-5
     
  2. jcsd
  3. Oct 16, 2009 #2
    You are simply using Q = Qo*e^(-t/tau). And tau = R*C, t = 4E-3 s. Take another look at RC circuits and the charging and discharging capacitor relations.
     
  4. Oct 17, 2009 #3
    what is e
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Capacitor Discharge
  1. Capacitor Discharge (Replies: 3)

Loading...