Q. For a thermocouple the neutral temperature is $270℃$ when its cold junction is at $20℃.$ What will be the neutral temperature and the temperature of inversion when the temperature of cold junction is increased to $40℃$
A) $290℃,\ 580℃$
B) $270℃,\ 580℃$
C) $270℃,\ 500℃$
D) $290℃,\ 540℃$
Explanation
(c) No charge in neutral temperature but temperature of inversion is
$t_{i} = 2t_{n} - t_{c} \Rightarrow t_{i} = 2 \times 270 - 40 = 500℃$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.