JEE Main · Physics · Mechanical Properties of Fluids
Fluid Statics: JEE Main previous year questions
19 questions in the 108 JEE Main shifts Lumi analysed, in 6 of 8 years. Pattern: Asked most years. 6 came in 2024–26. Here is how it is asked and which ideas come back.
- Questions
- 19
- in 17 of 108 shifts
- Years asked
- 6/8
- last asked 2026
- Weighted estimate
- 0.1
- model; history: 0.2 a shift on average, typically 0.0–0.3
Key findings
- 01
Asked in 6 of 8 years with analysed shifts and in 17 of 108 shifts: 19 questions, #146 of 196 topics. The years that asked it were 1.2 apart on average.
- 02
63% of its questions since 2020 tested an idea no earlier year had asked; 2 repeated an idea from the year before.
- 03
The most repeated idea is Pascal's Law, asked 5 times in 5 shifts (2021, 2023, 2024), most often as “pressure in hydraulic lift”.
- 04
JEE Main has asked 11 of the 56 ideas in this topic; 43 have never been asked, directly or inside another question.
- 05
Mostly asked as single correct (53%); 26% need a numerical answer, 37% are easy and 5% hard.
- 06
The skill tested most is calculation (63%), then multi-step (16%).
Questions a shift, year by year
Out of the 25 Physics questions in a shift. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift.
Raw count: 2017: 0 in 1 shift · 2020: 5 in 12 shifts · 2021: 4 in 24 shifts · 2022: 0 in 24 shifts · 2023: 4 in 12 shifts · 2024: 4 in 18 shifts · 2025: 1 in 8 shifts · 2026: 1 in 9 shifts.
- Up to 2023
- 0.2
- a shift, of 25
- Since 2024
- 0.1
- 0.0
- Usual gap
- 1.2 yrs
- between years asking it
- Shifts with it
- 17/108
- 16% of analysed shifts
How it is asked
Difficulty, format and skill
Across all 19 questions on Fluid Statics since 2017.
Difficulty
QUESTIONS- Easy7 · 37%
- Medium11 · 58%
- Hard1 · 5%
Format
SHARE- Single correct · 10 Q53%
- Numerical value · 5 Q26%
- Diagram based · 2 Q11%
- Assertion–reason · 1 Q5%
- Two statements · 1 Q5%
Skill tested
SHARE- Calculation · 12 Q63%
- Multi-step · 3 Q16%
- Application · 2 Q11%
- Conceptual · 2 Q11%
Repeats
New idea, or one asked before?
Each column is a year. Blue questions tested an idea no earlier year had asked; navy ones went back to an idea from an earlier year. 2017 is the first year, so everything in it counts as new. Heights are question counts, and Lumi analysed 1 to 24 shifts a year, so compare the split inside a column rather than heights across years.
- Idea asked for the first time
- Idea asked in an earlier year
Coverage of the topic
JEE Main has asked 11 of the 56 ideas in this topic. 43 have never been asked yet.
- Asked directly11 · 20%
- Touched inside another question2 · 4%
- Never asked43 · 77%
Ideas come from Lumi’s JEE syllabus map. A never-asked idea is not a safe skip: across all of JEE Main, 22% of questions since 2024 tested an idea no earlier year had asked.
Drill down
Chapter, idea, question
Every idea JEE Main tested in this topic, with its eight years. Open one to read the questions.
9 ideas inside
Squares are the 8 years with analysed shifts, 2017 to 2026. A number is the questions that year when there is more than one; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. Share is of the level above.
Ideas
Every idea inside this topic
11 different ideas were tested; 3 came more than once.
pressure in hydraulic lift
Numerical value · 5 shifts · 2 numericalload mass from floatation depth change
Single correct · 4 shifts · 1 numericalforce on bottom of tube from liquid column
Numerical value · 2 shifts · 1 numericalnet force on hinged window
Numerical value · 1 shift · 1 numericalimmersed volume ratio at two-liquid interface
Diagram based · 1 shiftweight in air from apparent loss in water
Single correct · 1 shiftballoon load at changed pressure and temperature
Single correct · 1 shiftangular frequency of floating body
Single correct · 1 shiftmass of bubble from buoyant acceleration
Single correct · 1 shiftratio of hydrostatic forces on wall segments
Diagram based · 1 shiftdensity ratio from floating height change
Single correct · 1 shift
| Idea | Years asked | Times | Shifts | Format | Numerical |
|---|---|---|---|---|---|
| Pascal's Lawpressure in hydraulic lift | 5 | 5 | Numerical valueCalculation | 2 | |
| Law of Floatationload mass from floatation depth change | 4 | 4 | Single correctCalculation | 1 | |
| Hydrostatic Pressureforce on bottom of tube from liquid column | 2 | 2 | Numerical valueCalculation | 1 | |
| Hydrostatic Thrust on Plane Surfacesnet force on hinged window | 1 | 1 | Numerical valueCalculation | 1 | |
| Floating at a Two-Liquid Interfaceimmersed volume ratio at two-liquid interface | 1 | 1 | Diagram basedApplication | – | |
| Apparent Weight in Fluidsweight in air from apparent loss in water | 1 | 1 | Single correctCalculation | – | |
| Gas Balloon Payload Capacityballoon load at changed pressure and temperature | 1 | 1 | Single correctCalculation | – | |
| SHM of a Floating Bodyangular frequency of floating body | 1 | 1 | Single correctApplication | – | |
| Archimedes' Principlemass of bubble from buoyant acceleration | 1 | 1 | Single correctCalculation | – | |
| Force on Vertical Wallsratio of hydrostatic forces on wall segments | 1 | 1 | Diagram basedCalculation | – | |
| Temperature Effects on Buoyancydensity ratio from floating height change | 1 | 1 | Single correctMulti-step | – |
Times and shifts count every analysed shift. Across JEE Main, 78% of questions since 2024 went back to an idea an earlier year had asked; the rest were new. All repeated ideas
Every question
Fluid Statics questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested. Open one for its options and the official answer.
JEE Main 20261 question in 1 shift
- 2 Apr, Shift 1Q50A tub is filled with water and a wooden cube is placed in the water. The…
Idea: Law of Floatation
EasyNumerical value
JEE Main 20251 question in 1 shift
- 2 Apr, Shift 1Q47A vessel with square cross-section and height of 6 m is vertically partitioned. A small window of with hinged door is…
Idea: Hydrostatic Thrust on Plane Surfaces
New ideaMediumNumerical value
JEE Main 20244 questions in 4 shifts
- 4 Apr, Shift 2Q57Mercury is filled in a tube of radius 2 up to a height of 30 . The force exerted by mercury on the bottom of the tube is ______…
Idea: Hydrostatic Pressure
Asked the year beforeMediumNumerical value - 5 Apr, Shift 2Q54A hydraulic press containing water has two arms with diameters as mentioned in the figure. A force of 10 N is applied on the surface of…
Idea: Pascal's Law
Asked the year beforeEasyNumerical value · figure - 8 Apr, Shift 2Q37A cube of ice floats partly in water and partly in kerosene oil. The ratio of volume of ice immersed in water to that in kerosene oil…
Idea: Floating at a Two-Liquid Interface
New ideaMediumDiagram based · figure - 9 Apr, Shift 1Q37A sphere of relative density and diameter D has concentric cavity of diameter d. The ratio of , if it just floats on…
Idea: Law of Floatation
MediumSingle correct
JEE Main 20234 questions in 4 shifts
- 6 Apr, Shift 2Q37Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: When you squeeze one end…
Idea: Pascal's Law
EasyAssertion–reason - 8 Apr, Shift 1Q32An air bubble of volume rises from the bottom of a lake deep to the surface at a temperature of…
Idea: Hydrostatic Pressure
New ideaMediumSingle correct - 8 Apr, Shift 2Q35A hydraulic automobile lift is designed to lift vehicles of mass 5000 kg. The area of cross section of the cylinder carrying the load is…
Idea: Pascal's Law
EasySingle correct - 10 Apr, Shift 1Q36Given below are two statements : Statement I : Pressure in a reservoir of water is same at all points at the same level of water.…
Idea: Pascal's Law
EasyTwo statements
JEE Main 20214 questions in 3 shifts
- 4 Aug, Shift 1Q2A ship’s anchor of density 7500 kg/m appears 196N lighter when completely submerged in water of density 1000 kg/m than in air. The…
Idea: Apparent Weight in Fluids
New ideaEasySingle correct - 4 Aug, Shift 1Q11A piece of wood has dimensions , b and h. Its relative density is ‘d’. It is floating in water such that the side ‘h’ is vertical.…
Idea: SHM of a Floating Body
New ideaMediumSingle correct - 27 Aug, Shift 1Q8A balloon carries a total load of 185 kg at normal pressure and temperature of C. What load will the balloon carry on rising to…
Idea: Gas Balloon Payload Capacity
New ideaMediumSingle correct - 24 Feb, Shift 1Q24A hydraulic press can lift 100 kg when a mass ‘m’ is placed on the smaller piston. It can lift __________ kg when the diameter of the…
Idea: Pascal's Law
New ideaEasyNumerical value
JEE Main 20205 questions in 4 shifts
- 8 Jan, Shift 1Q6Consider a solid sphere of radius R and mass density , . The minimum density…
Idea: Law of Floatation
New ideaHardSingle correct - 8 Jan, Shift 1Q7A leak proof cylinder of length 1 m, made of a metal which has very low coefficient of expansion is floating vertically in water at…
Idea: Temperature Effects on Buoyancy
New ideaMediumSingle correct - 8 Jan, Shift 2Q6Two liquids of densities and are filled up behind a square wall of side as shown in…
Idea: Force on Vertical Walls
New ideaMediumDiagram based · figure - 4 Sep, Shift 1Q6A air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s. The density of water is 1 gm cm and water offers…
Idea: Archimedes' Principle
New ideaMediumSingle correct - 5 Sep, Shift 1Q7A hollow spherical shell at outer radius R floats just submerged under the water surface. The inner radius of the shell is r. If the…
Idea: Law of Floatation
New ideaMediumSingle correct
Questions from the official JEE Main Paper 1 shifts published by NTA (CBSE for 2017). Questions NTA dropped are left out. Topic and idea tags, counts and notes are Lumi’s.