Isopotential is a fancy word that means that everything in a certain space is the same. Imagine you have a big bowl of soup and you want to make sure that all the soup has the same temperature. You stir and stir until there are no hot spots or cold spots. That's what isopotential means - everything in that soup has the same temperature.
In science, we talk about isopotential when we are looking at electrical currents. Think of it like a river of electricity flowing through a wire. Sometimes, there might be hot spots or cold spots in the wire that can cause problems. But if everything is at the same electrical potential (like the soup with the same temperature), then the electricity can flow smoothly and everything is happy.
So, when someone says that a space is isopotential, it means that everything in that space is the same when it comes to electricity. It's like all the people in a classroom having the same understanding of the topic - no one is more confused or advanced than anyone else. It makes things easier to work with and makes sure that everything is running smoothly.