Conductors are materials that allow the flow of electric current easily, while insulators are materials that do not allow the flow of electric current easily. Conductors have a high density of free electrons, allowing them to conduct electricity, while insulators have few free electrons, preventing the flow of electricity. Conductors have low resistance to the flow of electric current, while insulators have high resistance. Some examples of conductors are metals, such as copper and aluminum, while examples of insulators are rubber, glass, and plastic.
