What is an insulator?

An insulator is defined as a material that does not allow electricity to flow easily. This is due to its molecular structure, which does not have free electrons available to carry an electric charge. Common examples of insulators include rubber, glass, and plastic, which effectively inhibit the movement of electric current. This characteristic makes insulators essential in electrical systems, where they are used to protect and manage electrical components and wiring, preventing unwanted flow of electricity that could lead to short circuits or electrical shocks. Understanding the role of insulators is crucial in the field of electricity, as they ensure safety and efficiency in electrical applications.