Final answer:
Metals are good electrical conductors because they contain noncurrent carrying conductive members such as metallic strength.
Step-by-step explanation:
Metals are good electrical conductors because they contain noncurrent carrying conductive members such as metallic strength. In a metallic conductor, atoms are packed in a lattice structure and some electrons are free to move among the atoms. When an electrical field is applied, these free electrons respond by accelerating, generating thermal energy.
Examples of noncurrent carrying conductive members are overhead power cables with a steel core to strengthen them, ships' superstructures, container vehicle bodies, and tube trains.