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!

Circuits 1 help with integration

  1. Oct 4, 2016 #1
    1. The problem statement, all variables and given/known data

    http://imgur.com/a/qlQ5z
    jJjYb53.png

    2. Relevant equations

    i=i(o)+1/L integration(v0) dt formula is in the attemp at a solution.
    3. The attempt at a solution
    http://imgur.com/a/HVjl1
    For the interval 2<t<infinite . I understand that voltage at 2ms is 0 , but where did they get 2x10^-3? is that the 2ms to seconds? and how did they 50ma after the integration? I only get 10ma not 50. Thanks in advance.
     
  2. jcsd
  3. Oct 4, 2016 #2
    Nevermind I think I got it. After getting 25t we do i(0.002seconds)=25(0.002)= 0.05a then for the interval 2<t<infinity i= i (0) +1/L... substituting i(o) is 0.05a so i=0.05 + integration of 0 which is 0= so the final answer is 0.05a :eek:
     
  4. Oct 9, 2016 #3

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    Looks correct to me. I checked it this way..

    V = Ldi/dt
    so
    di/dt = V/L
    = 5*10-3/200*10-6
    =25 amps per second (or 25t if you prefer)

    Calculate I after 2mS..
    25*2*10-3 = 0.05A
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Circuits 1 help with integration
  1. Circuits Help! (Replies: 3)

  2. Help with Circuits (Replies: 3)

  3. Help with circuit (Replies: 7)

  4. Help with circuit (Replies: 9)

Loading...