JEE Main 2022PhysicsThermal Properties of MatterEasyMCQ

JEE Main 2022 — Thermal Properties of Matter Question with Solution

JEE Main 2022 (24 Jun Shift 1)

Question

Two metallic blocks M1 and M2 of same area of cross-section are connected to each other (as shown in figure). If the thermal conductivity of M2 is K then the thermal conductivity of M1 will be : [Assume steady state heat conduction]

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Show full solutionCorrect option: B
Correct answer
B8K

Step-by-step explanation

Let thermal conductivity of M1 be K'.

Using heat current relation for steady state conduction,

K'A100-8016=KA80-08

⇒K'×2016=K×808⇒K'=8K

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About this question

This is a previous-year question from JEE Main 2022, 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.