How to find value of inductance in LR series circuit?

AI Thread Summary
To find the inductance "L" in an LR series circuit, the reactance (XL) is calculated using the formula XL = 2*pi*f*L, where f is the frequency. The discussion emphasizes the need to show work for homework help, indicating that understanding the relationship between voltage drop and frequency is crucial. The approach to solving for L can involve geometry or equations related to complex impedance, with geometry being the chosen method in this case. Measurements of voltage drop across the resistor at various frequencies will aid in determining the inductance. Proper application of these principles will yield the value of inductance in the circuit.
mathman44
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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?
 
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For homework help you have to show some work to get some help.

What is the reactance, XL as a function of frequency?
 
XL = 2*pi*f*L
 
OK... are you going to solve for L using geometry or the equations for complex impedence?
 
Geometry. Got it, thanks.
 
Good deal.
 
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