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Junction and Interface Temperature for JEE: 11 solved questions

Real JEE paper questions on junction and interface temperature, part of thermal properties of matter. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2004 to 2026. No sign-in needed to read them.

What this topic asks

• Junction temperature — 11 questions

All 11 questions with solutions

• Rods x and y of equal dimensions but of different materials are joined as follows: a rod of material x runs f… JEE Main 22nd Jan 1st Shift 2026
• A steel rod and a copper rod are joined end to end, the free end of the steel rod being inside a furnace at 4… JEE Main 27th July 1st Shift 2022
• Two metallic blocks M₁ and M₂ of the same area of cross-section are joined face to face, M₁ being 16 cm thick… JEE Main 24th June 2nd Shift 2022
• Two insulating sheets are stacked one on the other, the upper sheet having thermal resistance R₂ and its oute… JEE Main 26th Feb 2nd Shift 2021
• Two materials having coefficients of thermal conductivity 3K and K and thickness d and 3d respectively are jo… JEE Main 9th April 1st Shift 2019
• A large cylindrical rod of length L is made by joining two identical rods of copper and steel of length L/2 e… JEE Main Online 2012
• One end of a thermally insulated rod is kept at a temperature T₁ and the other at T₂. The rod is composed of… AIEEE 2007
• A composite slab consists of two materials of thermal conductivity K and 2K and thickness x and 4x respective… AIEEE 2004
• Two cylindrical rods A and B made of different materials are joined end to end in a straight line. The ratios… JEE Main 7th April 2nd Shift 2025
• Three conductors of the same length are connected as follows: conductors 1 and 2, of thermal conductivities k… JEE Main 22nd Jan 1st Shift 2025
• Two plates A and B have thermal conductivities 84 W m⁻¹ K⁻¹ and 126 W m⁻¹ K⁻¹ respectively. They have the sam… JEE Main 13th April 2nd Shift 2023