Okay kiddo, let's talk about dielectric losses.
First, let's understand what a dielectric is. It's something that doesn't conduct electricity very well or at all. Examples of dielectrics are rubber, plastic or ceramic materials.
Now imagine you have two metal plates really close to each other, like in a capacitor. A capacitor is like a battery that can store electrical energy. The space between those two plates is where we put our dielectric material.
When we charge up our capacitor, the metal plates attract opposite charges, like magnets. The more charge we put in, the stronger the attraction between the plates become.
But if we add dielectric material between our plates, it's harder for the charges to move freely. That means it needs more energy from the battery to fill up the capacitor to the same charge as before.
This extra energy that is lost is called dielectric loss. And it's because the dielectric material absorbed some of the energy as heat, rather than storing all of the energy.
So basically, when we put a dielectric material between our plates in a capacitor, some of the energy is lost, which makes it harder to charge the capacitor up.
I hope that helps you understand dielectric losses, kiddo!