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Chapter 1PhysicsCBSE Class 11

Units and Measurements

Units and Measurements is Chapter 1 of NCERT Class 11 Physics. The chapter covers Introduction, The International System of Units, Significant Figures, Dimensions of Physical Quantities, and more. Use this public guide to revise the official topic structure before asking Lerno for step-by-step help.

6 topicsChapter 1 of 14
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Topics covered

6 sections
01

Introduction

Introduction
02

The International System of Units

Introduction
03

Significant Figures

IntroductionRules for Arithmetic Operations with Significant FiguresRounding off the Uncertain DigitsRules for Determining the Uncertainty in the Results of Arithmetic Calculations
04

Dimensions of Physical Quantities

Introduction
05

Dimensional Formulae and Dimensional Equations

Introduction
06

Dimensional Analysis and Its Applications

IntroductionChecking the Dimensional Consistency of EquationsDeducing Relation among the Physical Quantities

Key concepts

IntroductionThe International System of UnitsSignificant FiguresDimensions of Physical QuantitiesDimensional Formulae and Dimensional EquationsDimensional Analysis and Its ApplicationsIntroductionRules for Arithmetic Operations with Significant FiguresRounding off the Uncertain DigitsRules for Determining the Uncertainty in the Results of Arithmetic Calculations

Practice questions

Frequently asked

What is covered in Units and Measurements?

Units and Measurements is Chapter 1 in NCERT Class 11 Physics. The verified chapter structure includes Introduction, The International System of Units, Significant Figures, Dimensions of Physical Quantities, Dimensional Formulae and Dimensional Equations.

How should I revise Units and Measurements?

Revise the chapter topic by topic: start with Introduction, The International System of Units, Significant Figures, then practice questions that mix definitions, examples, and application steps.

Can I use Lerno for Class 11 Physics questions?

Yes. Lerno is built for CBSE students and uses NCERT-grounded context so students can ask for explanations, practice prompts, and step-by-step guidance for this chapter.

Study prompts

1

Explain Introduction from Units and Measurements and give one NCERT-style example or practice step.

2

Explain The International System of Units from Units and Measurements and give one NCERT-style example or practice step.

3

Explain Significant Figures from Units and Measurements and give one NCERT-style example or practice step.

4

Explain Dimensions of Physical Quantities from Units and Measurements and give one NCERT-style example or practice step.

5

Explain Dimensional Formulae and Dimensional Equations from Units and Measurements and give one NCERT-style example or practice step.

6

Explain Dimensional Analysis and Its Applications from Units and Measurements and give one NCERT-style example or practice step.

Explore this chapter

Practice QuestionsChapter-wise NCERT-aligned questionsSolutions GuideStep-by-step approach per topicChapter ExplanationTopic map for structured revision

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