We use it every day, but most of us haven't got a clue how electricity makes things work. What's going on in the wires that make motors move, and heaters heat? Whether it's a toaster or an electric ...

This video explains why the National Grid uses a system of alternating current, known as AC, and transformers. Step up transformers are used to lower the current and minimise the amount of energy lost ...

Speaker one Have you ever wondered how some of our devices can charge so quickly? Understanding the characteristics of electrical components is crucial to designing devices that can charge our phones ...