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CBSE

Class 11

Physics NCERT Book

Chapter 2:

Ncert Books Class 11 Physics Chapter 2 Free Download

An Overview of Ncert Books Class 11 Physics Chapter 2 Free Download

Ever wondered how scientists measure things as tiny as an atom or as huge as the Earth? In Ncert Books Class 11 Physics Chapter 2 Free Download, you'll discover the basics of measurement, learn about units, and see how everything in Physics starts with proper measurement. This chapter helps you build strong foundations for topics that you'll learn later in Class 11 and 12.

You might get confused with terms like accuracy, precision, or dimensional analysis, but don't worry! With clear explanations, practical examples, and all essential NCERT solutions in a handy downloadable PDF, Vedantu makes things super easy. If you get stuck or want to double-check your progress, you can always refer to the Class 11 Physics Important Questions for more practice or explore the Class 11 Physics Syllabus to see what’s next.

Practice truly makes you stronger—solving the important questions will help you prepare better for your CBSE exams and clear up tricky concepts with confidence!

List of Sections in Chapter - 2: Units and Measurement

For the Ease of the Students, a List of All the Sections of this Chapter is Included Below:

2.1 Introduction

2.2 The international system of units

2.3 Measurement of length

2.3.1 Measurement of Large Distances

2.3.2 Estimation of Very Small Distances: Size of a Molecule

2.3.3 Range of Lengths

2.4 Measurement of mass

2.4.1 Range of Masses

2.5 Measurement of time

2.6 Accuracy, precision of instruments, and errors in measurement

2.6.1 Absolute Error, Relative Error, and Percentage Error

2.6.2 Combination of Errors

2.7 Significant figures

2.7.1 Rules for Arithmetic Operations with Significant Figures

2.7.2 Rounding off the Uncertain Digits

2.7.3 Rules for Determining the Uncertainty in the Results of Arithmetic Calculations

2.8 Dimensions of physical quantities

2.9 Dimensional formulae and dimensional equations

2.10 Dimensional analysis and its applications

2.10.1 Checking the Dimensional Consistency of Equations

2.10.2 Deducing Relation among the Physical Quantities

List of Examples in Chapter - 2: Units and Measurement

Below is a List of Examples From Chapter 2 of the NCERT Books of Physics.

Example 2.1

Example 2.2

Example 2.3

Example 2.4

Example 2.5

Example 2.6

Example 2.7

Example 2.8

Example 2.9

Example 2.10

Example 2.11

Example 2.12

Example 2.13

Example 2.14

Example 2.15

Example 2.16

Example 2.17

List of Exercises in Chapter - 2: Units and Measurement

A Serial List of the Exercises of the Chapter is Added Below, Along With the Number of Questions Included in Each:

Exercise 2.1 - 4 questions

Exercise 2.2 - 4 questions

Exercise 2.3 - 1 question

Exercise 2.4 - 6 questions

Exercise 2.5 - 1 question

Exercise 2.6 - 3 questions

Exercise 2.7 - 1 question

Exercise 2.8 - 3 questions

Exercise 2.9 - 1 question

Exercise 2.10 - 6 questions

Exercise 2.11 - 1 question

Exercise 2.12 - 1 question

Exercise 2.13 - 1 question

Exercise 2.14 - 4 questions

Exercise 2.15 - 1 question

Exercise 2.16 - 1 question

Exercise 2.17 - 1 question

Exercise 2.18 - 1 question

Exercise 2.19 - 1 question

Exercise 2.20 - 1 question

Exercise 2.21 - 1 question

Exercise 2.22 - 5 questions

Exercise 2.23 - 1 question

Exercise 2.24 - 1 question

Exercise 2.25 - 1 question

Exercise 2.26 - 1 question

Exercise 2.27 - 1 question

Exercise 2.28 - 1 question

Exercise 2.29 - 1 question

Exercise 2.30 - 1 question

Exercise 2.31 - 1 question

Exercise 2.32 - 1 question

Exercise 2.33 - 1 question

FAQs on Ncert Books Class 11 Physics Chapter 2 Free Download

1. What is the significance of using NCERT Books for Class 11 Physics Chapter 2 – Units and Measurement?

CBSE guidelines apply to NCERT books for conceptual learning. These books can be used both as reference guides and as study aids for school exams, board exams, and other competitive tests. Board exams typically utilize NCERT books as reference materials. During examination times, NCERT is the only book that can be relied upon. There are significant advantages in NCERT books over other books, such as the fact that they are significantly cheaper. As a result, compulsory education is available to students from all socioeconomic levels. Vedantu's website or mobile app contains free study materials that can assist you in learning more.

2. How will you measure the length of a line according to the concepts of Chapter 2 of Class 11 Physics?

It is a tricky question and was not easy to answer; it was easy to think of a way to solve it. The best and straightforward way is to measure the length of a line. You need a gauge.

If you want to measure it short, make it long enough.
If you want to measure it long, make it short enough.
If you want to measure the distance between the mountain and the lake, make the mountain your footstool.
The distance between heaven and earth is one step.

3. Do I need to practise all the questions provided in Chapter 2 – Units and Measurement of Class 11 Physics?

It would be very useful if you practiced all the questions provided in Physics Chapter 2 as these questions will be tested in any upcoming exams. Also, reading the Chapter questions is also good for your Units and Measurement knowledge as you will be able to grasp the concepts clearly by practicing all the questions. Most of these questions can be answered without practicing, since the purpose of these questions is to get familiar with the terminology, the meaning of each subject, the type of answers and how to solve them.

4. How is the mass measured according to the concepts taught in Chapter 2 of Class 11 Physics?

When we take a mass measurement we measure the mass of a single mass object. It is usually done by measuring the mass of the object we are dealing with and using that mass to calculate the mass of the room we are in. The most obvious way of measuring the mass of a single mass object is to put the object into the gravitational field of a standard object, say the Earth. That mass object will weigh the same in any gravitational field and the same gravitational field will weigh the same object. We call that the Law of Universal Gravitation.

5. According to the concepts taught in Chapter 2 of Class 11 Physics, what is SONAR (sound navigation and ranging)?

Today, with the introduction of precise recording electronics and innovations in Sonar design, the sensitivity of Sonar for finding and mapping the bottom has greatly increased.

SONAR (sound navigation and ranging) technology was first developed in the late 1940’s. It is capable of mapping the ocean’s bottom with enormous accuracy, which is why it is called ‘bottom searching’ technology. SONAR technology uses a sonar pulse, which is bounced off the seafloor and recorded using a detector. With this data, the sound pulses can be processed to reveal the features of the underwater terrain and the objects and sources of fish.