JEE Main · Physics · Thermal Properties of Matter

Radial Conduction in Spherical Shells

JEE Main asked Radial Conduction in Spherical Shells once in the 108 shifts Lumi analysed, on 31 Aug 2021, Shift 2. It belongs to Heat Conduction, in Thermal Properties of Matter (Physics).

Updated 2026-10-24

Times asked: 1; in 1 shift
Years: 1 of 8
First asked: 2021; the only year
Pattern: Gone quiet; asked once so far

Questions on this idea a shift, by year

2017–2026. Asked in 2021. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

20260 of 9
20250 of 8
20240 of 18
20230 of 12
20220 of 24
20211 of 24
20200 of 12
20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

Radial heat flow through spherical shells

Difficulty

Easy 0Medium 1Hard 0

The question was multiple choice.

Every question

The question

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

31 Aug 2021, Shift 2 · Q4Two thin metallic spherical shells of radii $r_1$ and $r_2$ ( $r_1 < r_2$ ) are placed with their centres coinciding. A material of thermal…MediumSingle correct

Shift: 31 Aug 2021, Shift 2.

Same topic

Other ideas in Heat Conduction

Heat Conduction has 6 ideas JEE Main has asked; 1 of them came up in more than one question.

Junction Temperature6× · 2025
Equivalent Thermal Conductivity (Series)once · 2022
Fourier's Law of Conductiononce · 2022
Equivalent Thermal Conductivity in Seriesonce · 2021
Slabs in Seriesonce · 2020

Topic analysis Chapter analysis Study this chapter All repeated ideas