Final answer:
In an IoT system, a controller works in conjunction with actuators to convert electrical signals into physical movements. Actuators serve as the executable element directed by the controller's processed information.
Step-by-step explanation:
A controller works together with actuators that take electrical input and transform it into physical action in a typical IoT (Internet of Things) system. Actuators can be thought of as the 'muscles' of the system, carrying out actions as directed by the controller. These can range from simple devices like motors that turn wheels or move levers, to more complex systems such as those found in integrated circuits within microprocessor chips or components in sophisticated missile systems. Essentially, the controller processes the information it receives and sends instructions to the actuators, which carry out the desired actions.