How to find value of inductance in LR series circuit?

[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?

 

[Phrak]

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

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

 

[mathman44]

X_L = $$2*pi*f*L$$

 

[Phrak]

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

 

[mathman44]

Geometry. Got it, thanks.

 

[Phrak]

Good deal.