# 3: Reactance and Impedance - Inductive

- Page ID
- 1393

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- 3.2: AC Inductor Circuits
- Inductors do not behave the same way resistors do. Whereas resistors simply oppose the flow of electrons through them (by dropping a voltage directly proportional to the current), inductors oppose changes in current through them, by dropping a voltage directly proportional to the rate of change of current. In accordance with Lenz’s Law (which you can read more about here), this induced voltage is always of such a polarity as to try to maintain current at its present value.

- 3.3: Series Resistor-Inductor Circuits
- In the previous section, we explored what would happen in simple resistor-only and inductor-only AC circuits. Now we will mix the two components together in series form and investigate the effects.

- 3.6: What Is the Skin Effect? The Skin Depth of Copper in Electrical Engineering
- The skin effect is where alternating current tends to avoid travel through the center of a solid conductor, limiting itself to conduction near the surface. This effectively limits the cross-sectional conductor area available to carry alternating electron flow, increasing the resistance of that conductor above what it would normally be for direct current.