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Units and Measurements — Study Plan

CBSE · Class 11 · Physics

A step-by-step study plan for Units and Measurements, CBSE Class 11 Physics: what to learn first, what to practise and when to revise.

147 questions72 flashcards5 concepts

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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. Physical Quantities, Units, and Systems of Units, 2. SI Base Units and Retained Units, 3. Significant Figures and Scientific Notation.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 147 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Units and Measurements after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Measurement compares a quantity with a standard unit.
  • Base units are used for fundamental quantities.
  • Derived units are combinations of base units.
  • Minute, hour, day, and year are time units retained for general use.
  • Degree is related to radian by 1° = (π/180) rad.
  • Litre, tonne, bar, curie, roentgen, quintal, barn, are, hectare, and atm are retained units.
  • Significant figures show measurement precision.
  • Leading zeros in a number less than 1 are not significant.
  • Trailing zeros are significant only when a decimal point is present.

Common Mistakes to Avoid

A unit and a physical quantity are the same thing.

All units are base units, so derived units are not important.

Radian and steradian must have dimensions because they are SI units.

Memory Tips

Seven SI base units

CGS, FPS, and MKS systems

Radian and steradian are dimensionless SI-recognised units

Measurement means comparison with a unit

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Frequently Asked Questions

What are the important topics in Units and Measurements for CBSE Class 11 Physics?
Key topics in Units and Measurements include Physical Quantities, Units, and Systems of Units, SI Base Units and Retained Units, Significant Figures and Scientific Notation, Rules for Rounding Off and Error Handling. Study these first, then practise questions on each for Class 11 exams.
How should I revise Units and Measurements for Class 11 exams?
Learn the core ideas first, then work through the 147 practice questions on Units and Measurements. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Units and Measurements

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