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: Finding inductance

  1. Feb 21, 2010 #1
    1. The problem statement, all variables and given/known data

    Find the inductance L. This is for a lab experiment. For a resistor-inductor series circuit, I have a graph of a triangular input waveform from a generator and the voltage across the inductance, VL, as a function of time. I also have the value of the resistance R.

    3. The attempt at a solution

    Well, given this information, I need to find the value of L. I've looked over the equations which seem most relevant but I can't find a suitable one. What am I overlooking?
     
  2. jcsd
  3. Feb 21, 2010 #2
    Without knowing how your graph looks or any other specifics of your problem, it's a bit hard for me to help, I don't know about anyone else. Here's what I can tell you:

    You know that

    [tex]V = L \frac{dI}{dt} = L \frac{\Delta I}{\Delta t}[/tex]

    which will give you the voltage drop across the inductor.
     
  4. Feb 21, 2010 #3
    Yeah that's what we did, we rearranged the equation to be L=RV(dt/dv)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook