Heat and Thermodynamics 3 Question 6
6. Three rods of copper, brass and steel are welded together to form a Y-shaped structure. Area of cross-section of each rod is
The rods are thermally insulated from surroundings except at ends. Thermal conductivities of copper, brass and steel are
(a)
(b)
(c)
(d)
(2014 Main)
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Solution:
- In thermal conduction, it is found that in steady state the heat current is directly proportional to the area of cross-section
Then,
According to thermal conductivity, we get
