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: RL Discharge Time Constant

  1. Feb 2, 2010 #1
    1. circuit consists of 10v supply, a switch, R1 (200ohm), R2 (100ohm) in series with a 1H inductance. with R3 (200ohm) across R1 and Inductance. I have to work out the time constants when switch is open and when closed.

    2. when closed I have used 1 time constant = t = L/R, then 5 x L/R. I struggle now with the open formula

    3. t= 1/200 = 0.005s anf 5 x L/R = 0.025s - using 200 ohm as rt for R2 & R3 as equivalent of series. Now struggling with open switch is it just the same with Rt being 266.67 ohms
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted