A device used to extend the range of a radio signal over a larger geographical area is called a _____.

A device used to extend the range of a radio signal over a larger geographical area is called a repeater because it works by receiving a weak radio signal, amplifying it, and then transmitting the boosted signal. This allows the original signal to cover a greater distance and overcome obstacles like mountains or buildings that could otherwise hinder communication. Repeaters are particularly important in emergency situations, such as firefighting operations, where reliable communication over large areas is crucial for coordination and safety.

In contrast, a receiver is designed to pick up radio signals and convert them into usable information, but it does not extend the range of a signal. A transmitter sends out radio signals, but like the receiver, it does not enhance or prolong the signals. A switchboard, on the other hand, is primarily used for connecting calls and managing communications rather than extending radio signal reach. Understanding the role of a repeater helps in ensuring effective communication in situations where distance and obstacles could impair the transmission of signals.