Which statement describes a conductor?

• A. Material that allows current to flow easily (low resistance), such as copper
• B. Material with extremely high resistance that resists current
• C. An insulating material like plastic
• D. A material that generates voltage

Answer: (A)

A conductor is a material that lets electric current flow readily because it has low resistance. This means electrons can move through it with little opposition. Copper is a classic example because its atoms have easily movable electrons, so a copper conductor carries current efficiently. According to Ohm’s law, I = V/R, for a given voltage the current is larger in a material with low resistance, which is why wires made of copper are used to transmit electricity.

The other descriptions describe materials that resist current or block it (high resistance, insulators like plastic) or describe a device that provides voltage rather than simply conducting it (a source of voltage). So the statement that best describes a conductor is that it allows current to flow easily due to its low resistance, with copper serving as a typical example.