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Saturday, 31 October

JEE Main · Physics · Thermal Properties of Matter

Newton's Law of Cooling

JEE Main asked Newton's Law of Cooling 3 times in 3 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to Thermal Radiation, in Thermal Properties of Matter (Physics). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2021
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170’200.03’210.03’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 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
  • 20231 of 12
  • 20221 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

Numerical value is the usual form. Skill tested: calculation.

  • Temperature after successive cooling intervals
  • Count correct statements on heat transfer

Difficulty

Easy 0Medium 3Hard 0

1 of the 3 questions had a numerical answer.

Every question

All 3 questions

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

  1. 6 Apr 2023, Shift 2 · Q38A body cools in 7 minutes from 60∘60^\circC to 40∘40^\circC. The temperature of the surrounding is 10∘10^\circC. The temperature of the body…MediumSingle correct
  2. 27 Jul 2022, Shift 1 · Q38Read the following statements : A. When small temperature difference between a liquid and its surrounding is doubled, the rate of loss of…MediumOther
  3. 22 Jul 2021, Shift 2 · Q23In 5 minutes, a body cools from 75°C to 65°C at room temperature of 25°C. The temperature of body at the end of next 5 minutes is ________…MediumNumerical value

Shifts: 22 Jul 2021, Shift 2, 27 Jul 2022, Shift 1, 6 Apr 2023, Shift 2.

Same topic

Other ideas in Thermal Radiation

Thermal Radiation has 5 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas