Which action is the result of negative feedback?
- A flashlight is used at night by a camper.
- A strong feedback noise is heard in an auditorium during a rehearsal.
- An unexpected chemical reaction in a chemical plant causes an explosion.
- A thermostat shuts down an air conditioning unit when the temperature reaches the set temperature.
Explanation: Negative feedback tends to move a system toward stabilization and equilibrium. A thermostat monitors and maintains room temperature in the summer by activating and deactivating an air conditioning unit. Chemical reactions that lead to explosions or unpleasant noises that are caused by audio signal feedback are examples of positive feedback. A flashlight used by a camper does not involve system feedback.
Exam with this question: IoT Connecting Things 2.0 – Chapter 1 Quiz Answers
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