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NEET Physics Chapter Test

NEET Physics Units and Measurements Chapter Test

Attempt an original chapter-wise test on SI units, dimensions, dimensional analysis, significant figures, errors, least count and unit conversion. Submit your answers to receive an instant score and revision direction.

10 MCQs10 marksSuggested time: 12 minutesFree practice
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Why This Test Matters

Practice the rules behind NEET Physics calculations

Units and Measurements is not only a memory chapter. It checks whether you can read units, compare dimensions, apply significant-figure rules and estimate the effect of measurement errors.

This chapter test is designed for active practice rather than passive reading. Every question has an explanation so that you can identify whether your mistake came from a formula, exponent, unit conversion, option reading or calculation step.

Original practice content: These are PrepMocker-created NEET-style questions. They are not claimed to be official NTA previous-year questions.

Dimensions

Derive and compare dimensions of physical quantities.

Significant figures

Apply counting, rounding and calculation rules.

Measurement errors

Calculate absolute, relative and percentage errors.

Unit conversion

Handle powers correctly in area and volume conversions.

Two-Minute Revision

Rules to recall before attempting

  • Force has dimensions [M L T-2] and pressure has dimensions [M L-1 T-2].
  • Leading zeros are not significant; captive zeros between non-zero digits are significant.
  • In addition or subtraction, the result follows the least number of decimal places.
  • In multiplication or division, the result follows the least number of significant figures.
  • For a product or quotient, maximum fractional errors are added.
  • If a quantity is raised to a power, the fractional error is multiplied by that power.
  • When converting area or volume, square or cube the linear conversion factor.
Interactive Test

Attempt the 10-question chapter test

Select one option for every question. Your score is calculated in the browser; no login is required.

Question 1 · Dimensions

The dimensions of impulse are the same as those of:

Question 2 · Significant figures

How many significant figures are present in 0.005060?

Question 3 · Error propagation

If R = A/B and percentage errors in A and B are 3% and 2%, maximum percentage error in R is:

Question 4 · Dimensional analysis

Which relation is dimensionally consistent for displacement s?

Question 5 · Unit conversion

1 m² is equal to:

Question 6 · Error in power

Q is proportional to x³. If the percentage error in x is 1.5%, the error in Q is:

Question 7 · SI units

The SI unit of pressure is:

Question 8 · Precision

A smaller least count generally indicates:

Question 9 · Derived quantities

The dimensions of power are:

Question 10 · Error rules

If length l has 2% error, the maximum percentage error in area A = l² is:

Answer Review

Correct answers and explanations

Use this table after submission. Do not check it before attempting the test if you want a realistic score.

QAnswerReason
1BImpulse = force × time = momentum.
2C5, 0, 6 and the final zero are significant.
3BErrors in a quotient add: 3% + 2% = 5%.
4ABoth ut and at² have dimensions of length.
5C(10²)² = 10⁴.
6CError is multiplied by power 3: 4.5%.
7CPressure is measured in pascal.
8BSmaller least count generally permits finer readings.
9APower = work/time = [M L² T⁻³].
10CArea is proportional to l², so error = 2 × 2% = 4%.
Score interpretation: 8–10: strong basics; 5–7: revise error and dimension rules; 0–4: study the chapter summary first and reattempt this test.
Study Strategy

How to improve after this test

  1. Write down every incorrect question and the rule it tested.
  2. Separate conceptual errors from calculation or option-reading errors.
  3. Revise only the weak rule, then solve two fresh examples.
  4. Reattempt the test after a gap instead of immediately memorising the answers.

For NEET preparation, combine this short test with mixed Physics practice so that unit and error rules become part of your regular numerical-solving routine.

FAQs

NEET Units and Measurements Test FAQs

Is this an official NEET previous-year paper?

No. This is an original PrepMocker chapter test created in the style of NEET Physics practice. It should be used for revision, not as an official NTA paper.

How much time should I spend on this test?

Try to complete 10 questions in about 12 minutes. If a question takes too long, mark it mentally, move on and return after attempting the easier questions.

What should I do if my score is low?

Revise SI units, dimensions, significant figures and error propagation separately. Then solve the questions again without looking at the explanations.

Does a dimensionally correct equation always represent a correct law?

No. Dimensional analysis can test consistency, but it cannot find dimensionless constants or confirm every physical condition of an equation.