Relays are which type of device in IoT systems?

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Multiple Choice

Relays are which type of device in IoT systems?

Relays act as actuators because they convert a small electrical control signal into a physical switch action that drives a real-world load. In an IoT setup, a microcontroller or controller sends a low-power signal to the relay coil, energizing it to open or close high-power contacts and turn devices like lights, motors, or pumps on or off. This is the kind of physical effect that an actuator provides. It isn’t a sensor (which would measure something in the environment) and it isn’t a controller (which would process data and make decisions). Both electromagnetic and solid-state relays perform this actuator role by enabling safe, controlled switching of external circuits.

Relays act as actuators because they convert a small electrical control signal into a physical switch action that drives a real-world load. In an IoT setup, a microcontroller or controller sends a low-power signal to the relay coil, energizing it to open or close high-power contacts and turn devices like lights, motors, or pumps on or off. This is the kind of physical effect that an actuator provides. It isn’t a sensor (which would measure something in the environment) and it isn’t a controller (which would process data and make decisions). Both electromagnetic and solid-state relays perform this actuator role by enabling safe, controlled switching of external circuits.

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