Distinguish between electrical conductors and insulators.
Electrical Conductors | Insulators |
Materials which allow electric current to pass through. | Materials which do not allow electric current to pass through. |
Materials which offer least resistance. | Materials which offer highest resistance. |
Examples are silver, copper, and aluminum. | Examples are wood , rubber, and plastic. |
They contain a large number of free electrons. | They do not contain free electrons. |