Units and Measurement Class 11 One Shot | मात्रक एवं मापन | Class 11 Physics Chapter 1 Hindi Medium

Introduction to Physics 00:00:00 This important chapter of Class 11th begins. It explains what physics is and how it relates to phenomena in nature around us (such as gravity, a fan running, electrical energy, etc.). The Need for Measurement & Units 00:02:44 Through examples from everyday life (such as buying vegetables or mangoes), the need for measurement is explained. Two things are required to complete a measurement: a numerical value and its unit. Physical Quantities & Fundamental Units 00:04:14 The types of physical quantities and the seven fundamental units (such as the meter, kilogram, kelvin, candela, mole, etc.) are explained, which are completely independent. Significant Figures 01:11:04 This final part of the video explains the rules for finding significant figures with examples. It explains the rules for decimals, non-decimals, and powers of 10.