NEET UG · Physics · Class 11

Units and Measurements: NEET previous year questions

20 questions in ten years of NEET, asked in 10 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 20; 10 of 10 papers
10-year average: 1.9; a paper · 1.9 since 2024 0.0
Typical range: 1–3; questions a paper; fewest 1, most 3
Weighted estimate: 2.0; model, recent papers count more · about 8 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on Units and Measurements

Priority

Should do

Among the chapters that took NEET from half to 80% of its questions. How bands are set

Past questions: 20in 10 of 10 papers
Study plan gives it: 13 hover 12 months; 10 h over 6

Study this chapter →

Ideas asked most often

Error Propagation in Power Functions3×
Dimensionless Physical Quantities2×
Dimensions of Universal Constants2×

67 of the 86 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation70%
Recall25%
Application5%

Most common asks: numerical (8); dimension of physical quantity (6); significant figures in subtraction (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #44; of 80 by weighted estimate
Rank in Physics: #8; of 27 chapters
Share of the paper: 1.1%; ten-year average
Busiest year: 2020; 3 questions
Year to year: Steady; varies by about 0.8 questions
Long-run direction: +0.07; questions per paper, per year
Easy questions: 55%; 42% of ideas rated hard
With a figure: 0%; graph, diagram or structure
Study time: 13 h; 10 h on a 6-month plan
Marks per study hour: 0.63; #20 of 80 chapters
Foundation for others: 8%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20171
20181
20191
20203
20213
20223
20232
20243
20252
20261

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation60%
Recall25%
Multi-step10%
Application5%

Coverage

How much of the chapter NEET has used

We split the chapter into 86 ideas. In ten years NEET built a question around 16 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 16
Touched on in a question: 3
Never asked: 67

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

Units and Dimensions · Every year20
1113332321

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Units and DimensionsEvery year	1	1	1	3	3	3	2	3	2	1	20

03+questions in that year’s paper

Units and Dimensions
Expect a short numerical problem (one or two formula steps, four numeric options) about Units and Dimensions; a one-line factual recall item is the next most likely shape. Past framings centre on: numerical; dimension of physical quantity.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open20 · 100%100%10/10333232
16 ideas inside
- Repeated3 · 15%15%3/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 16 different ideas were tested. These came more than once, or are new since 2024.

Error Propagation in Power Functions3×
numerical
Dimensionless Physical Quantities2×
units and dimensions of angle quantities
Dimensions of Universal Constants2×
dimension of physical quantity
Dimensions of Thermal QuantitiesNew1×
dimension of physical quantity
Vernier Caliper Reading and Zero ErrorNew1×
numerical
Principle of HomogeneityNew1×
dimensionless combination of constants
Vernier Caliper Least CountNew1×
numerical

Idea	Times	Usually asked as
Error Propagation in Power Functionsnumerical	3	Numerical
Dimensionless Physical Quantitiesunits and dimensions of angle quantities	2	One-line MCQ
Dimensions of Universal Constantsdimension of physical quantity	2	One-line MCQ
Dimensions of Thermal Quantitiesdimension of physical quantity	1	One-line MCQNew
Vernier Caliper Reading and Zero Errornumerical	1	NumericalNew
Principle of Homogeneitydimensionless combination of constants	1	One-line MCQNew
Vernier Caliper Least Countnumerical	1	NumericalNew

Every question

Units and Measurements questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20261 question

Q37Consider that $\sigma_s$ , $k_B$ , b represent Stefan-Boltzmann constant, Boltzmann constant and Wien's displacement law constant,…One-line MCQ

NEET 20252 questions

Q25Consider the diameter of a spherical object being measured with the help of a Vernier callipers. Suppose its 10 Vernier Scale Divisions…Numerical
Q42A physical quantity $P$ is related to four observations $a$ , $b$ , $c$ and $d$ as follows: $P = a^3b^2/c\sqrt{d}$ The percentage errors of…Numerical

NEET 20243 questions

Q17The quantities which have the same dimensions as those of solid angle are :One-line MCQ
Q18In a vernier calipers, $(N + 1)$ divisions of vernier scale coincide with $N$ divisions of main scale. If 1 MSD represents 0.1 mm, the…Numerical
Q37A force defined by $F = \alpha t^2 + \beta t$ acts on a particle at a given time $t$ . The factor which is dimensionless, if $\alpha$ and…One-line MCQ

NEET 20232 questions

Q7A metal wire has mass $(0.4\pm0.002)$ g, radius $(0.3\pm0.001)$ mm and length $(5\pm0.02)$ cm. The maximum possible percentage error in…Numerical
Q23The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are :One-line MCQ

NEET 20223 questions

Q8Plane angle and solid angle have :One-line MCQ
Q14The dimensions $[MLT^{-2}A^{-2}]$ belong to the :One-line MCQ
Q50The area of a rectangular field (in m $^2$ ) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits…Numerical

NEET 20213 questions

Q11If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.One-line MCQ
Q19If E and G respectively denote energy and gravitational constant, then $\frac{E}{G}$ has the dimensions of :One-line MCQ
Q23A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : 0 mm Circular scale reading :…Numerical

NEET 20203 questions

Q146A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is :Numerical
Q167Dimensions of stress are :One-line MCQ
Q176Taking into account of the significant figures, what is the value of 9.99 m $-$ 0.0099 m ?Numerical

NEET 20191 question

Q44In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4%…Numerical

NEET 20181 question

Q37A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero…Numerical

NEET 20171 question

Q19A physical quantity of the dimensions of length that can be formed out of c, G and $\frac{e^2}{4\pi\epsilon_0}$ is [c is velocity of…One-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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