Internet of Things (IoT) Practice Exam

What type of device is a 100K resistor in an electronic circuit?

1. Sensor

2. Actuator

3. Control

4. None of the above

The correct answer is: None of the above

A 100K resistor is classified as a passive component rather than any of the categories mentioned in the choices. Resistors do not actively sense or control physical phenomena like sensors or actuators; instead, they simply limit the flow of electric current in a circuit, which is a fundamental function in electronic design. Sensors are devices that detect changes in the environment and convert that information into signals for further processing. Actuators convert electrical signals into physical movement or action. Control devices, often linked with systems to manage inputs and outputs, are primarily responsible for decision-making within an electronic system. A resistor does not perform any of these active functions, which is why it is correctly categorized as "none of the above."