Which of the following materials is considered a conductor?

Copper is considered a conductor because it possesses high electrical conductivity, which allows it to easily transmit electricity. In the context of materials, conductors are substances that allow the flow of electric charge, making them essential in electrical wiring and circuits. Copper, in particular, is widely used in electrical applications due to its excellent conductivity and ability to resist corrosion, which enhances its longevity and performance.

In contrast, rubber, wood, and glass are classified as insulators. Insulators resist the flow of electricity, making them suitable for protecting users from electrical currents and preventing unintended circuits. Understanding the properties of different materials is essential in the field of electrical work and safety protocols to ensure proper usage in various applications.