Surfing up to learn about electronics, in preparation for waging assault on our non-functioning dimmable kitchen low-voltage pendant lights. Primarily, I was motivated by a desire to avoid powerful electric shocks, showers of sparks, or other things involving singeing or smoking.
Actually, I believe I was investigating light sensors and other realms of automation, such as computer-controlled machines or devices that interacted with the real world. I stumbled across a site that began its discourse on the electronic control ofthings with a study of the underlying foundation of electricity. What a nice confluence of events: have always wanted to play with this kind of stuff, plus learning about electricity might help me with my future kitchen lighting repairs. So for about an hour I studied the nature of electrons (large numbers of them), voltage, current, resistance, and work.
"... we have learned that charge is present in matter in the form of nuclei and electrons. Evidently all these electrical phenomena boil down to the motion of charged particles in matter."