What happens to the core resistance in a continuous loop fire detection system when a fire occurs?

In a continuous loop fire detection system, the core resistance decreases when a fire occurs. This is based on the principle that, in systems designed for fire detection, the presence of heat or flame changes the properties of the fire detection material. As the temperature rises due to a fire, the resistance of the sensing element drops, which effectively allows more current to flow through the circuit.

When the resistance decreases, it creates a condition that triggers the alarm system. The higher current flow resulting from the reduced resistance is detected by the monitoring electronics, which then activates the alarm to alert occupants or operators about the fire situation. This fundamental operation allows for prompt response to potential fire hazards, which is crucial for safety in aviation environments.

Understanding this concept is essential for effectively troubleshooting and maintaining fire detection systems. The incorrect options highlight scenarios that do not accurately depict the behavior of resistance in a fire detection system during a fire event, thus reinforcing the importance of recognizing the specific dynamics of such systems.