Question

In a given themocouple, the temperature of cold junction is ${20}^{o}C$ while the temperature is ${270}^{o}C$. The temperature of inverson is

• A. ${590}^{o}C$
• B. ${520}^{o}C$
• C. ${470}^{o}C$
• D. ${420}^{o}C$

Answer 1

Answer: (B)

${520}^{o}C$

For thermocouples,
${\theta }_n=\frac{({\theta }_i+{\theta }_c)}{2}$
Where, ${\theta }_n$ is the neutral temperature, ${\theta }_i$ is the temperature of inversion and ${\theta }_c$ is the temperature of cold junction.
${\theta }_i=2\left({\theta }_n\right)-{\theta }_c$
${\theta }_i=2\left(270\right)-20=540-20={520}^{\circ }C$