Thermistor Mechanism — FRCA Primary MCQ
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Correct answer: B — A resistance change that decreases non-linearly with increasing temperature
A thermistor is a semiconductor whose resistance decreases non-linearly with increasing temperature (negative temperature coefficient). It is small / has rapid response / and high sensitivity but requires linearisation. A thermocouple generates a voltage (Seebeck effect) proportional to the temperature difference between two dissimilar metal junctions.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment