Which part of a radio set is responsible for sending radio signals?

The part of a radio set that is responsible for sending radio signals is the transmitter. A transmitter is designed to generate radio frequency signals, which are then modulated to carry data such as audio signals or digital information. It takes an input signal, typically from a microphone or other audio source, and amplifies it to a level suitable for broadcasting.

In a typical radio communication system, once the transmitter creates the signal, it usually passes it on to the antenna, which converts the electrical signals into electromagnetic waves that can be transmitted through the air. While the antenna plays a crucial role in radiating the signal and can affect the efficiency and range of transmission, it does not create the signals itself; it is the transmitter that does this fundamental work.

Moreover, the receiver is responsible for capturing and decoding the received signals, while the power supply provides the necessary electrical energy for the operation of the transmitter and receiver. Each component plays a vital role, but the specific function of creating and sending radio signals is distinctly attributed to the transmitter.