Superconductivity

Superconductivity is a special type of electricity in which the electrical current travels without any resistance. It is like a very slippery highway, which helps the current move very quickly and easily. It happens when certain materials are cooled to very low temperatures. When the temperature goes down, the particles inside the material (like tiny atoms) start to behave differently. They stick together in pairs and line up very neatly. These pairs act like lots of tiny magnets, which help them move next to each other like a chain. This helps the current flow with no resistance, like cars on a slippery highway. In some materials, this happens at temperatures close to absolute zero, which is -273°C. That's why it's so hard and expensive to use superconductivity.