Physics · 2022
NEET 2022 · 4 September · Code W6 · Q41
Two rods one made of copper and other made of steel of same length and same cross sectional area are joined together. The thermal conductivity of…
Two rods one made of copper and other made of steel of same length and same cross sectional area are joined together. The thermal conductivity of copper and steel are $\displaystyle 385 \mathrm{~J} \mathrm{~s}^{-1} \mathrm{~K}^{-1} \mathrm{~m}^{-1}$ and $\displaystyle 50 \mathrm{~J} \mathrm{~s}^{-1} \mathrm{~K}^{-1} \mathrm{~m}^{-1}$ respectively. The free ends of copper and steel are held at $\displaystyle 100$°C and $\displaystyle 0$°C respectively. The temperature at the junction is, nearly :
Official answer
(1)
88.$\displaystyle 5$°C
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