What is an insulator?

An insulator is defined as a material that conducts electricity poorly. This characteristic is fundamental to the behavior of insulators, as they are used to restrict or prevent the flow of electrical current. Common examples of insulating materials include rubber, glass, and plastics, which have high electrical resistance, meaning they do not allow electrons to flow freely.

This property makes insulators essential in electrical applications, as they help protect users from electric shock, ensure the safe operation of electrical devices, and maintain the integrity of electrical systems by preventing unintended current paths. Their role contrasts with conductors, which are materials that permit electric current to flow easily.