JEE Main 2025 Physics question
Two cylindrical rods A and B made of different materials, are joined in a straight line. The ratios of lengths, radii and thermal conductivities of these rods are: , and . The free ends of rods A and B are maintained at 400 K, 200 K respectively. The temperature of rods interface is K, when equilibrium is established.
Answer: 360
Solution
Using thermal resistance balance equation, solving gives T=360 K.