What is the primary use of a coaxial cable?

The primary use of a coaxial cable is for transmitting radio frequency signals. Coaxial cables are designed specifically to carry high-frequency electrical signals with minimal signal loss and interference. The structure of a coaxial cable, which includes a central conductor surrounded by an insulating layer, a metallic shield, and an outer insulating layer, allows for effective signal transmission over long distances. This makes them ideal for applications such as cable television, internet services, and communications systems.

In contrast, other options like power transmission are typically handled by different types of cables designed to handle higher voltage levels more efficiently. Data storage is not applicable to coaxial cables as they are not used for storing digital information directly. Wireless communication, while it may sometimes be assisted by coaxial cables (for example, connecting antennas), fundamentally relies on electromagnetic waves and does not use coaxial cables for the transmission of signals in the air. Thus, coaxial cables are primarily recognized for their role in transmitting radio frequency signals.