NCERT Book PDF Class 11 Physics Chapter 1 Units and Measurements

Download the Class 11 Physics Chapter 1 Units and Measurements NCERT Book PDF, the official 2026-27 NCERT textbook chapter. It is the starting point for the Class 11 syllabus and the base for every numerical you solve in the Boards, JEE Main, JEE Advanced and NEET.

• Official NCERT 2026-27 chapter, clean and print-ready.
• Covers the SI system, significant figures, dimensions and error analysis.
• Read it alongside the solved exercises and the formula sheet linked below.

This Class 11 Physics Chapter 1 Units and Measurements NCERT Book PDF is the official 2026-27 NCERT text, checked page by page against the latest edition.

What Class 11 Physics Chapter 1 Units and Measurements Covers

The chapter builds the language of measurement that the rest of physics uses. It moves from units to significant figures, then to dimensions and their uses. The official NCERT sections are listed below.

Key Concepts You Will Study

Students should read the chapter with a pen and note each rule as it appears. The main ideas are short but return in every later chapter.

• The seven SI base units and how all derived units come from them.
• Rules for counting significant figures and rounding off the final answer.
• Writing the dimensional formula of any quantity as a product of M, L and T.
• The principle of homogeneity to check equations and convert units.
• Absolute, relative and percentage error, and how errors combine.

Why Download the NCERT Book PDF for This Chapter

The NCERT textbook is the single most important source for the CBSE exam, and most JEE and NEET questions from this chapter are built directly on its examples.

• Every Board question on units and errors comes from this text or its exercises.
• The worked examples show the correct way to present significant figures.
• Reading offline from the PDF avoids missing any small print rule.

How to Use the NCERT Book PDF for Units and Measurements

Read the chapter once fully, then work through it a second time with the exercises open. A short, ordered plan keeps the many small rules from blurring together.

• Read each section, then write its rule in your own words in a single line.
• Solve the in-text examples before looking at the given solution.
• Attempt the back exercises, then check them against the NCERT Solutions below.
• Revise the dimensional formulae table the night before the exam.

Other Class 11 Physics Units and Measurements Resources

Pair the textbook PDF with the solved answers, revision notes and formula sheet for the same chapter.

FAQs on Class 11 Physics Chapter 1 NCERT Book PDF