Why are metals generally good conductors of electric current $I$?

• A. Because metals do not contain any charged particles $q$.
• B. Because metals have free electrons $e$ that can move easily throughout the material.
• C. Because metals have tightly bound electrons $e$ that do not move.
• D. Because metals have a high resistance $R$ to the flow of electric charge $q$.

Answer: (B)

Verified step by step guidance

1. Understand that electric current \(I\) is the flow of electric charge \(q\) through a material.
2. Recall that for a material to conduct electricity well, it must have charged particles that can move freely.
3. Recognize that metals have free electrons \(e\) which are not tightly bound to atoms and can move easily throughout the metal lattice.
4. These free electrons act as charge carriers, allowing electric current to flow with low resistance.
5. Therefore, metals are good conductors because their structure provides many free electrons that facilitate the flow of electric current.