Question

Keeping the cold junction at $0^{0}C$, thermo emf due to a thermo couple is same whether hot junction is at ${200}^{0}C$ or ${360}^{0}C$. Neutral temperature is

• A. ${275}^{0}C$
• B. ${260}^{0}C$
• C. ${300}^{0}C$
• D. ${280}^{0}C$

Answer 1

Answer: (D)

${280}^{0}C$

$T_n-T_c=T_i-T_n$
${2T}_n=T_i+T_j$
$T_n=\frac{200+360}{2}={280}^{0}C$