@NathanG - I’m not an expert, but I do work in the utilities industry. We have things called transformers which are used to step up and step down electrical currents.
They use inductive reactance to do this. As the article correctly states, when you have two or more of these types of circuits close together, you wind up with fluctuations in the voltage.
Transformers exploit this tendency by using those fluctuations to increase or decrease the voltage as needed. Of course, you can buy smaller transformers from an electronics store and experiment with the technique on a scaled down level.
You have probably used transformers if you’ve traveled overseas and needed to step down their voltage so that it would work correctly with your appliances that use only 110 volts, alternating current.