1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Problem in auto induction .

  1. Apr 3, 2007 #1
    1. The problem statement, all variables and given/known data
    i tried to put all data in the image .

    http://img136.imageshack.us/img136/7443/photokg6.th.jpg [Broken]

    in the initial situation K was closed.in T = 0 ,K was opened.

    give the differenciel equation of the courant.

    3. The attempt at a solution

    (R+r)*i + L (di)/(dt) = 0 .

    my problem is that i don't know if we have to put (R+r)*i or only r*i in the differentiel equation of the courant .

    thanks in advance for any help.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Apr 3, 2007 #2
    by the way,if there is something not clear in the data of the problem ,i will be happy to explain it.
  4. Apr 3, 2007 #3
    does nobody know the solution?
  5. Apr 4, 2007 #4
    no answer !!:(
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Problem auto induction Date
Finding the Mass of a Hanging Rope (Wave Problem) Yesterday at 6:38 PM
Newton's Second Law Rocket Problem Wednesday at 12:25 PM
Auto-Closing Gate (Relative Acceleration problem homework) Sep 12, 2017
Auto crash problem Nov 11, 2007
Friction Problem of a auto Sep 20, 2007