EVERYDAY SCIENCE

Detailed explanation-1: -The presence of a large number of free electrons in copper, as in other metals, is what makes it a good conductor of electricity.

Detailed explanation-2: -Materials that do not let current flow easily are called insulators. Most nonmetal materials such as plastic, wood and rubber are insulators.

Detailed explanation-3: -To get an electrical current to flow through metals, the power source has to fight against resistivity. The lower the level of resistivity, the more electrical conductivity a metal has. And since copper wire has a low level of resistivity, it’s a fantastic electrical conductor.

Detailed explanation-4: -Most atoms hold on to their electrons tightly and are insulators. In copper, the valence electrons are essentially free and strongly repel each other. Any external influence which moves one of them will cause a repulsion of other electrons which propagates, “domino fashion” through the conductor.