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: How to find value of inductance in LR series circuit?

  1. Mar 13, 2010 #1
    Hi. This is a question from my lab. I have a series of measurements of the voltage drop across a resistor for various frequencies with a constant voltage source in an LR series circuit. From these measurements I am supposed to calculate the value of the inductance "L". How can I do this?
  2. jcsd
  3. Mar 13, 2010 #2
    For homework help you have to show some work to get some help.

    What is the reactance, XL as a function of frequency?
  4. Mar 13, 2010 #3
    XL = [tex]2*pi*f*L[/tex]
  5. Mar 13, 2010 #4
    OK... are you going to solve for L using geometry or the equations for complex impedence?
  6. Mar 14, 2010 #5
    Geometry. Got it, thanks.
  7. Mar 15, 2010 #6
    Good deal.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook