How to find value of inductance in LR series circuit?

1. Mar 13, 2010

mathman44

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. Mar 13, 2010

Phrak

For homework help you have to show some work to get some help.

What is the reactance, XL as a function of frequency?

3. Mar 13, 2010

mathman44

XL = $$2*pi*f*L$$

4. Mar 13, 2010

Phrak

OK... are you going to solve for L using geometry or the equations for complex impedence?

5. Mar 14, 2010

mathman44

Geometry. Got it, thanks.

6. Mar 15, 2010

Good deal.