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: Charge after three time constants?

  1. Jan 15, 2014 #1
    1. The problem statement, all variables and given/known data
    A 10V supple is connected to a 2.2μF capacitor in series with a 10kΩ resistor. To what value will it have charged after three time constants?

    2. Relevant equations
    I know that T=RC but I have no idea beyond this point

    3. The attempt at a solution

    the rest is unknown to me, if someone could explain it to me that would be awesome.
  2. jcsd
  3. Jan 15, 2014 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    Either find the expression for a charging capacitor or derive it yourself. It's a simple linear, first-order, constant-coefficient differential equation. (Sum currents to zero at the capacitor-resistor junction.)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted