Which of the following is an example of an energy transfer medium?

An energy transfer medium refers to a substance or material that facilitates the transfer of energy from one point to another. In this context, copper wire serves as an excellent example of an energy transfer medium because it is designed to conduct electricity. When a voltage is applied, electrical energy travels through the copper wire, allowing it to connect an energy source (like a battery) to a load (such as a motor or lightbulb).

Copper is a conductive material, which means it allows electrons to flow easily, thus enabling it to efficiently transmit electrical energy over distances. Its effectiveness as a conductor makes it a common choice in electrical wiring installations and circuits, playing a crucial role in the distribution of electrical power in various applications.