The energy in a battery is potential energy. I use two voltaic cells in my gameboy to make it operate. Filament is made out of tungsten. Electricians look for potential difference in appliances. I use a transformer to plug my supernintendo.
Electricians have a machine that checks for resistance.
An electric current flows through a circuit. I couldn't come up with something else. All that I really know about is video games. I also have another web page that is better. It's on what I like the most, video games.