Which term describes materials that allow current to travel through them, such as copper strand wire?

Which term describes materials that allow current to travel through them, such as copper strand wire?

• A. Insulators
• B. Semiconductors
• C. Resistors
• D. Conductors

Answer: (D)

Conductors are materials that let electric charges move easily, so current can pass through them when a voltage is applied. Metals like copper have lots of free electrons that respond readily to an electric field, giving them a very low resistance and high conductivity. That’s why copper strand wire is used for wiring—to provide a clear path for current with minimal loss. In contrast, insulators have few free carriers and resist current flow; semiconductors can conduct under certain conditions and have conductivity between that of conductors and insulators; resistors are components designed to oppose current flow, not just raw materials used to carry current.

Conductors are materials that let electric charges move easily, so current can pass through them when a voltage is applied. Metals like copper have lots of free electrons that respond readily to an electric field, giving them a very low resistance and high conductivity. That’s why copper strand wire is used for wiring—to provide a clear path for current with minimal loss. In contrast, insulators have few free carriers and resist current flow; semiconductors can conduct under certain conditions and have conductivity between that of conductors and insulators; resistors are components designed to oppose current flow, not just raw materials used to carry current.