Question
Question: Five rods of identical geometries are arranged as shown in figure. Temperatures are maintained at po...
Five rods of identical geometries are arranged as shown in figure. Temperatures are maintained at points A, C, D and E as 1000C, 00C, 400C and 600C respectively. Thermal conductivities of rods are shown in the figure. Heat current in the branch BE is - [Take length of each rod l = 1m and A = 1m2, K = 0.5 W/m-K]
A
10 W
B
20 W
C
Zero
D
None of these
Answer
Zero
Explanation
Solution
Net heat current at B must be zero so TB = 600C