CBSE Class 11 Physics Units And Measurements is an important chapter. It includes the basic units and derived units, significant figures, errors in measurement, and dimensionsional analysis. Every physical quantity stands with a unit. Starting from liters of water to weight of rice in kilograms, units are important in our daily life. Moreover, a good grasp on the dimensional analysis would help in eliminating options and solving even GATE questions without completely doing the problems.
NCERT Solutions for Class 11 Physics Chapter 2 is an essential student guide to help in understanding the concepts of the subject without going through the entire text initially. The section, Class 11 Units And Measurements, contains solutions for textual problems as well as for advanced queries. Students can then easily solve the problems using the answer key provided. It helps in preparing for competitive examinations and problembased examinations. This is the basic chapter, which could help a student study the subject in detail and eventually prepare for higher studies in science.
Among the many sections in the CBSE Class 11 examinations, for every problem that we need to attempt, writing the unit correctly gives us marks varying from 0.5 to 1. This increases the mark weightage. Therefore, It is essential for us to clearly understand the concepts presented in this chapter. This article outlines a thorough summary of the 10 chapters discussed in Class 11 Physics Units And Measurements.
Topics covered in this chapter
Sl.No.  Contents  Sub Contents 
1  Units and measurements 

2  The International System Of Units 

3  Measurement of Length 

4  Measurement of Mass 

5  Measurement of Time 

6  Accuracy, Precision Of Instruments, and Errors in Measurement 

7  Significant Figures 

8  Dimensions of Physical Quantities 

9  Dimensional Formulae and Dimensional Equations 

10  Dimensional Analysis and Its Applications 

11  FAQ 

In everyday life, we need to measure a number of physical quantities. To maintain the validity of the measurement, it should be accepted everywhere similarly. So, standardization is required. Measurement involves comparison with a standard reference, and it is termed a unit. Any measured value will be expressed as a combination of numbers and a unit. For example, 50 kg, here 50 is the magnitude and kg is the unit for weight expressed in kilograms.
The basic measurements are that of length, mass and time. These are called the basic units. The units which are obtained by the combination of these units to represent other physical quantities are the derived units. A system containing both of these units together is the system of units.