Which of the following is a good electrical conductor?

Copper is widely recognized as an excellent electrical conductor due to its atomic structure, which allows electrons to move freely. This high conductivity makes it the material of choice for wiring in electrical applications, including in radio transmission and other communication technologies.

The properties of metals, such as copper, enable them to conduct electricity efficiently compared to non-metals, which are typically insulators. In contrast, glass, wood, and rubber are materials that do not allow electric current to flow easily, as their atomic structures do not facilitate the movement of electrons. Thus, these materials are largely used for insulation rather than conductivity. Being a metal with high conductivity, copper is essential in electrical applications and is preferred in many electronic and electrical components, including those in ham radio equipment.