Learn

Saturday, 31 October

JEE Main · Physics · Mechanical Properties of Fluids

Law of Floatation

JEE Main asked Law of Floatation 4 times in 4 of the 108 shifts Lumi analysed, in 2020, 2024 and 2026. It belongs to Fluid Statics, in Mechanical Properties of Fluids (Physics). The longest wait between two years asking it was 4 years. In 2020 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2020
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.17’200’210’220’230.05’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

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

  • 20261 of 9
  • 20250 of 8
  • 20241 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20202 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.

  • Load mass from floatation depth change
  • Condition for floating hollow sphere

Difficulty

Easy 1Medium 2Hard 1

1 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 2 Apr 2026, Shift 1 · Q50A tub is filled with water and a wooden cube 10 cm×10 cm×10 cm10\ \mathrm{cm}\times10\ \mathrm{cm}\times10\ \mathrm{cm} is placed in the water. The…EasyNumerical value
  2. 9 Apr 2024, Shift 1 · Q37A sphere of relative density σ\sigma and diameter D has concentric cavity of diameter d. The ratio of Dd\frac{D}{d}, if it just floats on…MediumSingle correct
  3. 5 Sep 2020, Shift 1 · Q7A hollow spherical shell at outer radius R floats just submerged under the water surface. The inner radius of the shell is r. If the…MediumSingle correct
  4. 8 Jan 2020, Shift 1 · Q6Consider a solid sphere of radius R and mass density ρ(r)=ρ0(1−r2R2)\rho(r) = \rho_0\left(1-\frac{r^2}{R^2}\right), 0<r≤R0 < r \le R. The minimum density…HardSingle correct

Shifts: 8 Jan 2020, Shift 1, 5 Sep 2020, Shift 1, 9 Apr 2024, Shift 1, 2 Apr 2026, Shift 1.

Same topic

Other ideas in Fluid Statics

Fluid Statics has 11 ideas JEE Main has asked; 3 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas