The electrician measured the electrical current in the house with an ammeter that measured in amperes. The electrical energy in a generator is kinetic energy. 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.