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

1. a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons
2. a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons
3. a metallic insulator with free electrons surrounded by a rubber conductor lacking free electrons
4. a metallic insulator lacking free electrons surrounded by a rubber conductor with free electrons

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

Explanation:

A conductor is defined as a substance through which an electric current is able to flow freely without causing any resistance due to the availability of free electrons.  Example: silver, copper, gold etc are all good conductors of electricity.

Whereas an insulator is a substance which causes high resistance to the flow of free electrons.  Example: plastics, styrofoam, rubber etc are all insulators.

Thus,a electric cord which needs to conduct electric current is made up of metallic conductor with free electrons and is surrounded by an insulator to avoid electric shocks.

A conductor is defined as a substance through which an electric current is able to flow freely without causing any resistance due to the availability of free electrons.  Example: silver, copper, gold etc are all good conductors of electricity.

Whereas an insulator is a substance which causes high resistance to the flow of free electrons.  Example: plastics, styrofoam, rubber etc are all insulators.

Thus,a electric cord which needs to conduct electric current is made up of metallic conductor with free electrons and is surrounded by an insulator to avoid electric shocks.

Explanation:

object 2 because all the other ones are wrong