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Units and Measurements PYQs (previous year questions) for JEE Main: Units and Measurements (Physics) had 14 questions across the 11 official JEE Main papers we tagged (2016–2026), and appeared in 9 of them. Asked in 2 of 3 years. The concepts asked in the most papers: Dimensional Analysis, Errors in Measurement, Natural Units.
Year-wise question count
Asked in 2 of 3 years.
| Year | Papers | Questions | Per paper |
|---|---|---|---|
| JEE Main 2026 | 9 | 13 | 1.4 |
| JEE Main 2017 | 1 | Not asked | – |
| JEE Main 2016 | 1 | 1 | 1 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Dimensional Analysis | 7 | 7 | 2026 |
| Errors in Measurement | 4 | 4 | 2026 |
| Error Analysis | 1 | 1 | 2016 |
| Natural Units | 1 | 1 | 2026 |
| Units | 1 | 1 | 2026 |
How to practise Units and Measurements PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Units and Measurements questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary and the official answer, with a link to the official PDF.
JEE Main2026
- Q.26 (2 April, shift 1) · MCQ · Dimensional Analysis: Dimensions of energy density (1/2)eps0 E^2; compute 2a - b + c (official answer: option 2) PDF
- Q.27 (2 April, shift 1) · MCQ · Errors in Measurement: Maximum error in Young's modulus from screw gauge and scale readings (official answer: option 2) PDF
- Q.26 (2 April, shift 2) · MCQ · Dimensional Analysis: Express dimensions of G using h, L, M and T (official answer: option 2) PDF
- Q.26 (4 April, shift 2) · MCQ · Dimensional Analysis: Match Planck's constant, stopping potential, work function, threshold frequency with dimensions (official answer: option 1) PDF
- Q.27 (5 April, shift 1) · MCQ · Dimensional Analysis: Identify combination of L, C, R with dimensions ML²T⁻⁴A⁻² (official answer: option 1) PDF
- Q.26 (5 April, shift 2) · MCQ · Natural Units: Match metre, second, kilogram and kelvin with expressions in h, G, c (official answer: option 2) PDF
- Q.27 (5 April, shift 2) · MCQ · Errors in Measurement: Estimated error in resistance from voltmeter and ammeter least counts (official answer: option 4) PDF
- Q.26 (6 April, shift 1) · MCQ · Errors in Measurement: Percentage error in density of cylinder from m, l, d errors (official answer: option 2) PDF
- Q.27 (6 April, shift 1) · MCQ · Dimensional Analysis: Dimensions of AB for potential V = A sqrt(x)/(x+B) (official answer: option 4) PDF
- Q.26 (6 April, shift 2) · MCQ · Errors in Measurement: Percentage error in volume of sphere from 2% diameter error (official answer: option 3) PDF
- Q.27 (6 April, shift 2) · MCQ · Dimensional Analysis: Match physical constants with their dimensional formulae (official answer: option 3) PDF
- Q.26 (8 April, shift 2) · MCQ · Units: Earth-Venus distance in a unit equal to the speed of light (official answer: option 2) PDF
- Q.27 (8 April, shift 2) · MCQ · Dimensional Analysis: Exponents relating magnetic field to distance, permittivity, E and time (official answer: option 1) PDF
JEE Main2016
- Q.1 · MCQ · Error Analysis: Reported mean time and error from four pendulum timing readings PDF
Units and Measurements in other exams
The same chapter in other official papers we tagged: JEE Advanced (19 questions), NEET (3 questions).
Other Physics chapters
- Kinematics PYQs
- Laws of Motion PYQs
- Work, Energy and Power PYQs
- Rotational Motion PYQs
- Gravitation PYQs
- Properties of Solids and Liquids PYQs
- Thermodynamics PYQs
- Kinetic Theory of Gases PYQs
- Oscillations and Waves PYQs
- Electrostatics PYQs
- Current Electricity PYQs
- Magnetic Effects of Current and Magnetism PYQs
- Electromagnetic Induction and AC PYQs
- Electromagnetic Waves PYQs
- Optics PYQs
- Dual Nature of Matter and Radiation PYQs
- Atoms and Nuclei PYQs
- Electronic Devices PYQs
- Experimental Skills PYQs
FAQ
How many Units and Measurements questions come in JEE Main?
In the official papers we tagged: 13 in 2026 (9 papers) and 1 in 2016 (1 paper). Not asked in the other year. That is 14 questions in all, about 5% of Physics.
Which Units and Measurements topics repeat in JEE Main?
Asked in the most papers: Dimensional Analysis, Errors in Measurement, Natural Units. The concept table lists every one with its count.
Are these official JEE Main questions?
Yes. Every question is from an official JEE Main paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.