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!

The current in a series RL circuit

  1. Nov 23, 2012 #1
    1. The problem statement, all variables and given/known data

    The current in a series RL circuit increases to 20% of its final value in 3.4μs. If L = 2.0mH, what is the resistance R?

    2. Relevant equations

    I=I_0(1-e^(-t/(L/R))) <----Im not sure if this equation is right?

    3. The attempt at a solution

    I'm unsure how to start this problem, or if I'm on the right track with this equation?
  2. jcsd
  3. Nov 23, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Neither do I, but assuming it is...
    In terms of the variables in that equation, what would be the final value, and what would be the value after 3.4μs?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: The current in a series RL circuit
  1. Current in RL circuit (Replies: 3)