ELI5: Explain Like I'm 5

Volta effect

Okay kiddo, so you know how sometimes we play with a battery and we connect it to a light bulb to make it light up?

Well, when we do that, something very interesting happens that is called the Volta effect. The Volta effect is actually named after a scientist named Alessandro Volta who discovered it a long time ago.

What happens is that when we connect the battery to the light bulb, something called an electric current starts flowing through the wire that connects them. That electric current is basically a bunch of tiny, tiny particles called electrons that are moving really, really fast.

But, when those electrons are moving through the wire, they start to bump into things like atoms and other particles. And when they do that, they can lose some of their energy, kind of like when we bump into something and we feel a little tired afterwards.

Now, because the electrons are losing some of their energy, they don't move as fast as they did when they first started flowing. And because of that, something really interesting happens - the part of the wire that is closest to the positive side of the battery becomes more positive, and the part of the wire that is closer to the negative side of the battery becomes more negative.

So, what does all of that mean? Basically, the Volta effect means that when an electric current flows through a wire, it can create a difference in charge between the two ends of the wire, which is what we call a voltage. And that voltage is what makes things like light bulbs and other electronics work.

Cool, huh?