{"id":822,"date":"2022-08-18T10:37:05","date_gmt":"2022-08-18T10:37:05","guid":{"rendered":"https:\/\/physics.educour.in\/ncert\/?p=822"},"modified":"2022-08-18T10:43:15","modified_gmt":"2022-08-18T10:43:15","slug":"ncert-class-11-physics-chapter-2","status":"publish","type":"post","link":"https:\/\/physics.educour.in\/ncert\/ncert-class-11-physics-chapter-2\/","title":{"rendered":"NCERT Class 11 Physics Chapter 2"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"822\" class=\"elementor elementor-822\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3317288 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3317288\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0aa9d9d\" data-id=\"0aa9d9d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b67d609 elementor-widget elementor-widget-text-editor\" data-id=\"b67d609\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.6.0 - 21-03-2022 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<h1><span style=\"font-size: 36pt; color: #000080;\">UNITS AND MEASUREMENT <\/span><span style=\"font-size: 36pt; color: #ff6600;\">(NCERT)<\/span><\/h1>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-a80f97d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a80f97d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-f9d62ad\" data-id=\"f9d62ad\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-39c332f elementor-widget elementor-widget-text-editor\" data-id=\"39c332f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3><span style=\"color: #000080;\">PART 1 <span style=\"color: #ff6600;\">[Page No 16 \u2013 22]<\/span><\/span><\/h3>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b05f6e elementor-widget elementor-widget-text-editor\" data-id=\"6b05f6e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h5><span style=\"color: #000000;\">2.1 INTRODUCTION [Units, Fundamental Units or Base Units, Derived Units]<\/span><\/h5><h5><span style=\"color: #000000;\">2.2 THE INTERNATIONAL SYSTEM OF UNITS [CGS system, FPS system, MKS system, SI system]<\/span><\/h5><h5><span style=\"color: #000000;\">2.3 MEASUREMENT OF LENGTH<\/span><\/h5><h6><span style=\"color: #008000;\">2.3.1 Measurement of Large Distances [parallax method]<\/span><\/h6><h6><span style=\"color: #008000;\">2.3.2 Estimation of Very Small Distances: Size of a Molecule<\/span><\/h6><h6><span style=\"color: #008000;\">2.3.3 Range of Lengths<\/span><\/h6><h5>2.4 MEASUREMENT OF MASS<\/h5><h6><span style=\"color: #008000;\">2.4.1 Range of Masses<\/span><\/h6><h5>2.5 MEASUREMENT OF TIME<\/h5>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-0059766 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0059766\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-f4abf3e\" data-id=\"f4abf3e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b961bc9 elementor-widget elementor-widget-text-editor\" data-id=\"b961bc9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-1.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-1<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-2.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-2<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-3.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-3<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-4.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-4<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-5.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-5<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-6.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-6<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part1-7.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part1-7<br\/><\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-cd41143 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cd41143\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-84d7cec\" data-id=\"84d7cec\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bd54548 elementor-widget elementor-widget-text-editor\" data-id=\"bd54548\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3>PART 2 <span style=\"color: #ff6600;\">[Page No 22 &#8211; 31]<\/span><\/h3>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e6f3afb elementor-widget elementor-widget-text-editor\" data-id=\"e6f3afb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h5>2.6 ACCURACY, PRECISION OF INSTRUMENTS AND ERRORS IN MEASUREMENT<\/h5><h6>[Systematic errors, Random errors, Least count error]<\/h6><h6><span style=\"color: #008000;\">2.6.1 Absolute Error, Relative Error and Percentage Error<\/span><\/h6><h6><span style=\"color: #008000;\">2.6.2 Combination of Errors<\/span><\/h6><h6><span style=\"color: #0000ff;\">(a) Error of a sum or a difference<\/span><\/h6><h6><span style=\"color: #0000ff;\">(b) Error of a product or a quotient<\/span><\/h6><h6><span style=\"color: #0000ff;\">(c) Error in case of a measured quantity raised to a power<\/span><\/h6><h5>2.7 SIGNIFICANT FIGURES<\/h5><h6><span style=\"color: #008000;\">2.7.1 Rules for Arithmetic Operations with Significant Figures<\/span><\/h6><h6><span style=\"color: #008000;\">2.7.2 Rounding off the Uncertain Digits<\/span><\/h6><h6><span style=\"color: #008000;\">2.7.3 Rules for Determining the Uncertainty in the Results of Arithmatic Calculations<\/span><\/h6>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-290344e elementor-widget elementor-widget-text-editor\" data-id=\"290344e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-1.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-1<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-2.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-2<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-3.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-3<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-4.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-4<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-5.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-5<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-6.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-6<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-7.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-7<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-8.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-8<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-9.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-9<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part2-10.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part2-10<br\/><\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-c9ae044 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c9ae044\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-c3a2e57\" data-id=\"c3a2e57\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dae0105 elementor-widget elementor-widget-text-editor\" data-id=\"dae0105\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h3><span style=\"color: #000080;\">PART 3<\/span> <span style=\"color: #ff6600;\">[Page No 31 &#8211; 34]<\/span><\/h3>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae0def6 elementor-widget elementor-widget-text-editor\" data-id=\"ae0def6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h5><span style=\"color: #008000;\">2.8 DIMENSIONS OF PHYSICAL QUANTITIES<\/span><\/h5><h5><span style=\"color: #008000;\">2.9 DIMENSIONAL FORMULAE AND DIMENSIONAL EQUATIONS<\/span><\/h5><h5><span style=\"color: #008000;\">2.10 DIMENSIONAL ANALYSIS AND ITS APPLICATIONS<\/span><\/h5><h6><span style=\"color: #0000ff;\">2.10.1 Checking the Dimensional Consistency of Equations<\/span><\/h6><h6><span style=\"color: #0000ff;\">2.10.2 Deducing Relation among the Physical Quantities<\/span><\/h6>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b1adcd elementor-widget elementor-widget-text-editor\" data-id=\"1b1adcd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part3-1.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part3-1<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part3-2.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part3-2<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part3-3.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part3-3<br\/><\/a> <a href=\"https:\/\/physics.educour.in\/wp-content\/uploads\/2021\/07\/NCERT-Physics-for-XI-Chapter-2-Part3-4.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\"  data-toolbar=\"bottom\" data-toolbar-fixed=\"off\">NCERT Physics for XI Chapter 2 Part3-4<br\/><\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>UNITS AND MEASUREMENT (NCERT) PART 1 [Page No 16 \u2013 22] 2.1 INTRODUCTION [Units, Fundamental Units or Base Units, Derived Units] 2.2 THE INTERNATIONAL SYSTEM OF UNITS [CGS system, FPS system, MKS system, SI system] 2.3 MEASUREMENT OF LENGTH 2.3.1 Measurement of Large Distances [parallax method] 2.3.2 Estimation of Very Small Distances: Size of a &#8230; <a title=\"NCERT Class 11 Physics Chapter 2\" class=\"read-more\" href=\"https:\/\/physics.educour.in\/ncert\/ncert-class-11-physics-chapter-2\/\" aria-label=\"More on NCERT Class 11 Physics Chapter 2\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"post_folder":[15],"_links":{"self":[{"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/posts\/822"}],"collection":[{"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/comments?post=822"}],"version-history":[{"count":5,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/posts\/822\/revisions"}],"predecessor-version":[{"id":830,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/posts\/822\/revisions\/830"}],"wp:attachment":[{"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/media?parent=822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/categories?post=822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/tags?post=822"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/physics.educour.in\/ncert\/wp-json\/wp\/v2\/post_folder?post=822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}