Which of the following materials is typically used as a conductor in electrical circuits?

Copper is widely used as a conductor in electrical circuits due to its excellent electrical conductivity, which allows it to transport electric current with minimal resistance. The atomic structure of copper enables free movement of electrons, making it highly efficient for conducting electricity.

Additionally, copper is malleable and ductile, meaning it can be easily shaped into wires and other forms without breaking, which is crucial for the practical applications in electrical wiring and components. Its resistance to corrosion further enhances its suitability for long-term use in various environmental conditions.

In contrast, wood, plastic, and glass are generally insulators, meaning they do not conduct electricity effectively. This insulating property makes them useful in protecting and containing electrical circuits but not in carrying electrical current.