Question

Three identical conducting rods are connected as shown in figure. Given that ${\theta }_a={40}^{\circ }C,{\theta }_b={30}^{\circ }Cand{\theta }_d={20}^{\circ }C$. Choose the correct options.

• A. Temperature of junction $b$ is ${15}^{\circ }C$
• B. Temperature of junction $b$ is ${30}^{\circ }C$
• C. Heat will flow from $c$ to $b$
• D. Heat will flow $b$ to $d$.

Answer 1

Answer: (B), (D)

Temperature of junction $b$ is ${30}^{\circ }C$
Heat will flow $b$ to $d$.

Given,
The temperature of junction $b$ is ${30}^{\circ }C$ as given, hence option B.
Heat flows from the higher temperature to the lower temperature. Hence option D.
Depending on the temperature at junction $c$, heat could either flow into it or out of it.
Hence B,D