Question

The temperature gradient of $0.5m$ long rod is ${80}^{o}C/m$. If the temperature of hotter end of the rod is ${30}^{o}C$, then the temperature of the cooler end is

• A. ${40}^{o}C$
• B. ${-10}^{o}C$
• C. ${10}^{o}C$
• D. $0^{o}C$

Answer 1

The correct option is B ${-10}^{o}C$

Temperature gradient m =80C/m
Temperature of hotter end $T_h=30C$
Let temperature of cooler end be $T_c$
Length of rod is l=0.5 m
m=80=$\frac{T_h-T_c}{l}$
$T_c=-10C$