Let [R=3KAℓ]
H=211R100−40 ...(1)
H=R100−TB .....(2)
H=3RTE−40 .....(3)
using (1) and (2)
120=1100−11TA
TB=89°C
using (1) and (3)
TE=73°C
Rods x and y of equal dimensions but of different materials are joined as shown in figure. Temperatures of end points A and F are maintained at 100°…
JEE Main 2026 — Physics Thermodynamics
2026mcqmedium
Rods x and y of equal dimensions but of different materials are joined as shown in figure. Temperatures of end points A and F are maintained at 100∘C and 40∘C respectively. Given the thermal conductivity of rodx is three times of that of rody, the temperature at junction points B and E are (close to):
Official previous-year question
Held on 22 Jan 2026 · Verified 6 Jul 2026.
Options
- A
80∘C and 70∘C respectively
- B
80∘C and 60∘C respectively
- C
60∘C and 45∘C respectively
- D
89∘C and 73∘C respectively
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