Which best describes the materials that make up an electrical cord?

Question

a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons
a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons
a metallic insulator with free electrons surrounded by a rubber conductor lacking free electrons
a metallic insulator lacking free electrons surrounded by a rubber conductor with free electrons

Answer 1

The best description of the materials that make up an electrical cord is:

a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons.

In this case, the metallic conductor (usually copper or aluminum) allows the flow of electricity because it has free electrons, while the rubber insulator prevents electrical conduction and protects against electrical shock.