Skin effect

Okay kiddo, imagine you have a big rubber band. When you pull it apart, it's easy to see the whole band - it looks the same all the way through.

Now imagine you have a long, thin spaghetti noodle. If you look at it from the side, it's a circle. But if you look at it from the end, it's just a line.

So what does this have to do with skin effect? Well, when we send electricity through a wire or a conductor, it doesn't just flow straight through like water in a pipe. Instead, the electricity spreads out and moves around the outside of the wire, kind of like the spaghetti noodle.

This means that if you have a really thick wire, the electricity will mostly stay in the center, but if the wire is really thin, the electricity will spread out all over the surface of the wire.

This can be a problem when we're trying to send a lot of electricity through a thin wire, like in high-frequency circuits. The electricity doesn't travel as efficiently, and we can lose some of the energy as heat.

So, to avoid this problem, we use special types of wire that are designed to reduce skin effect, or we use multiple smaller wires instead of one big wire. That way, the electricity can flow through the wire more easily without wasting heat.

And that's skin effect, kiddo!