Natuurkunde uitleg: spanning

Physics explanation video for upper elementary students. In this video, I explain the basics of electricity: what is voltage, how does it arise, when does something flow, and what happens then? We'll discuss charge, energy, voltage, and current. We'll look at how to measure these things and what voltage sources exist. Finally, a quick calculation to determine how many kilograms of batteries you need to replace a 70-liter gasoline tank.