What happens when the resistance of an NTC thermistor decreases?

When the resistance of a negative temperature coefficient (NTC) thermistor decreases, it indicates an increase in temperature. NTC thermistors are specifically designed to have a resistance that inversely correlates with temperature; as the temperature rises, their resistance drops. This principle allows them to function effectively as temperature sensors in various applications, including heating systems.

In practical use, as the temperature of the surrounding environment increases, the thermistor reacts to this change by lowering its resistance. This decrease in resistance can lead to increased current flow in a circuit, which might trigger a response in a control system, such as turning on a heating element or adjusting energy consumption for efficiency. Thus, it is accurate to state that a decrease in resistance correlates with an increase in temperature, making the assertion valid.

The other choices do not directly relate to the behavior of an NTC thermistor under temperature changes. Gas flow and air circulation are not inherently dependent on the thermistor's resistance, and heat output stabilization is a different concept that involves more factors than just the thermistor's function.