JEE Main 2012 — Thermal Properties of Matter Question with Solution
JEE Main 2012 (19 May Online)
Question
A large cylindrical rod of length is made by joining two identical rods of copper and steel of length each. The rods are completely insulated from the surroundings. If the free end of copper rod is maintained at and that of steel at then the temperature of junction is (Thermal conductivity of copper is 9 times that of steel)
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Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Let conductivity of steel then from question Conductivity of copper From formula temperature of junction;
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This is a previous-year question from JEE Main 2012, covering the Thermal Properties of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.