https://www.khanacademy.org/science/electrical-engineering/ee-circuit-analysis-topic#ee-ac-analysis

About this unit

Circuit analysis is the process of finding all the currents and voltages in a network of connected components. We look at the basic elements used to build circuits, and find out what happens when elements are connected together into a circuit.

这个系列有个不好的地方在，它没有足够多的习题，看完基本上就忘了