Thermocouple Seebeck Effect — FRCA Primary MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: B — The Seebeck effect generating a voltage at the junction of two dissimilar metals proportional to temperature
A thermocouple generates a small voltage (Seebeck effect) at the junction of two dissimilar metals (e.g. copper-constantan) proportional to the temperature difference between the measuring junction and a reference junction. Advantages: wide range / small size / rapid response. Disadvantage: low output voltage requiring amplification. Non-linear response.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment