What is the role of a relay in an electronic circuit?

The role of a relay in an electronic circuit is to open or close circuits based on electrical signals. A relay is an electromechanical switch that allows a low-power signal to control a higher-power circuit. When an electrical current passes through the coil of the relay, it generates a magnetic field that either attracts or repels a lever, causing the switch to close or open. This makes relays extremely useful for controlling large electrical loads or devices with minimal power input, enabling safe and efficient operation of various systems.

This function of relays allows for automation in circuit design, facilitating complex operations such as turning on motors, switching lights, or managing other types of machinery without direct human intervention. Understanding this role is key for those working with electronic circuits, as it highlights the importance of relays in managing different states within a system.