Which statement best describes a conductor?

• A. A material that offers high resistance to electron movement.
• B. A material that easily allows electrons to move.
• C. A material that stores charge.
• D. A material that insulates against current.

Answer: (B)

Conduction happens when electrons can move freely in a material under an electric field. A conductor has many free charge carriers and low resistance, so applying voltage produces a measurable current. Metals like copper and aluminum are classic examples because their outer electrons are loosely bound and can drift when a field is applied. This makes charge flow easy through the material. The idea that a material stores charge describes capacitance and doesn’t imply easy current flow, while an insulator resists current and has high resistance, the opposite of a conductor. So describing a conductor as a material that easily allows electrons to move best captures the concept.