1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Need help with circuit problem

  1. Sep 20, 2005 #1
    the problem is a series combination of 12k resistor and an unknown capacitor is connected to a 13 volt battery. One second after the circuit is completed, the voltage across the capacitor is 8v. Determine the capacitance of the capacitor. :uhh:
  2. jcsd
  3. Sep 21, 2005 #2


    User Avatar
    Homework Helper

    This is the problem related of charging a capacitor.
    The equation for the charge on the capacitor as a function of time is

    [tex] \q = CV \left( 1 - e^\ -t/CR \right) [/tex]
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook