Q. The temperature of inversion of a thermocouple is 620°C and the neutral temperature is 300°C. what is the temperature of cold junction ?
A) 20°C
B) 120°C
C) -20°C
D) -120°C
Explanation
[Solution from source] The neutral temperature is the mean of the cold-junction and inversion temperatures: 300 = (θc + 620)/2, so θc = −20°C. Taking the difference instead of the mean gives 20°C. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.