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: Find i(t) for t>0 if i(0) = 2A

  1. Feb 28, 2007 #1
    1. The problem statement, all variables and given/known data
    Find i(t) for t>0 if i(0) = 2A


    2. Relevant equations



    3. The attempt at a solution

    The hint from the instructor says to remove the inductor and replace it with a test source. First of all I hope I have the PSPICE schemtic drawn correctly. The dependent current source is .5i. Should I use a 1A current test source. That would make i test equal to the 1 A test source. Would V test be the voltage across the 1 A test source? If so, Vtest would be equal to 30 V. Then R thevenin would be vtest/i test = 30 ohms.
     

    Attached Files:

  2. jcsd
  3. Feb 28, 2007 #2

    berkeman

    User Avatar

    Staff: Mentor

    What's the "5i" thing in the middle? It looks kind of like a current controled voltage source (CCVS), but its input is shorted out?
     
  4. Mar 4, 2007 #3

    SGT

    User Avatar

    It seems to be a current controlled current source, but as you said the input branch is shorted, so it can be totally dismissed.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook