JEE Main Physics · Thermal Properties of Matter

Heat Conduction in JEE Main

Name: Heat Conduction: JEE Main previous year questions
Creator: Lumi

Heat Conduction (Physics, Thermal Properties of Matter) came 5 times in 5 of the 42 JEE Main shifts Lumi analysed, across 3 distinct ideas. 1 of them came in 2024–26; it was last asked in 2025.

Questions: 5; in 5 shifts
Ideas asked: 3; 1 asked more than once
Numerical answer: 3; 60% of its questions
Pattern: Comes in cycles; last asked 2025

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 2Medium 3Hard 0

Format

Numerical value3 Q
Single correct2 Q

Ideas inside the topic

3 ideas

Junction Temperature3 Q
Equivalent Thermal Conductivity (Series)1 Q
Slabs in Series1 Q

Where it sits

Part of Thermal Properties of Matter, which had 21 questions in all. Heat Conduction accounts for 24% of them. In Lumi's JEE taxonomy it belongs to Thermodynamics.

Every question

All 5 Heat Conduction questions

Newest first, each with its options and official answer.

7 Apr 2025, Shift 2 · Q47Two cylindrical rods A and B made of different materials, are joined in a straight line. The ratios of lengths, radii and thermal…MediumNumerical value
13 Apr 2023, Shift 2 · Q53Two plates A and B have thermal conductivities $84\ \mathrm{Wm^{-1}K^{-1}}$ and $126\ \mathrm{Wm^{-1}K^{-1}}$ respectively. They have same…EasyNumerical value
24 Jun 2022, Shift 1 · Q50Two metallic blocks $M_1$ and $M_2$ of same area of cross-section are connected to each other (as shown in figure). If the thermal…MediumSingle correctHas a figure
29 Jun 2022, Shift 1 · Q53As per the given figure, two plates A and B of thermal conductivity K and 2 K are joined together to form a compound plate. The thickness…EasyNumerical valueHas a figure
6 Sep 2020, Shift 2 · Q8Three rods of identical cross-section and lengths are made of three different materials of thermal conductivity $K_1$ , $K_2$ and $K_3$ ,…MediumSingle correctHas a figure