{"id":4436,"date":"2016-05-16T09:49:00","date_gmt":"2016-05-16T04:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/"},"modified":"2018-10-22T11:11:09","modified_gmt":"2018-10-22T05:41:09","slug":"ncert-solutions-class-12-physics-communication-system","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/","title":{"rendered":"NCERT Solutions class 12 physics Communication System"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/#NCERT_Class_12_Physics_Chapter-wise_Solutions\" >NCERT Class 12 Physics Chapter-wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/#CHAPTER_15_COMMUNICATION_SYSTEMS\" >CHAPTER 15 COMMUNICATION SYSTEMS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/#NCERT_Solutions_class_12_physics_Communication_System\" >NCERT Solutions class 12 physics Communication System<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/#NCERT_Solutions_for_Class_12_Physics\" >NCERT Solutions for Class 12 Physics<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions class 12 physics Communication System Class 12 Physics book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 12 Physics chapter wise NCERT solution for Physics part 1 and Physics part 2 for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>Download\u00a0<a href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-12-physics\/1251\/ncert-solutions\/5\/\">NCERT solutions for Physics\u00a0<\/a>as PDF.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/Class%2012%20physics%20book%2012.jpg\" alt=\"NCERT Solutions class 12 physics Communication System\" width=\"127\" height=\"155\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_12_Physics_Chapter-wise_Solutions\"><\/span><strong>NCERT Class 12 Physics Chapter-wise Solutions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 \u2013 Electric Charges and Fields<\/li>\n<li>2 \u2013 Electrostatic Potential and Capacitance<\/li>\n<li>3 \u2013 Current Electricity<\/li>\n<li>4 \u2013 Moving Charges and Magnetism<\/li>\n<li>5 \u2013 Magnetism and Matter<\/li>\n<li>6 \u2013 Electromagnetic Induction<\/li>\n<li>7 \u2013 Alternating Current<\/li>\n<li>8 \u2013 Electromagnetic Waves<\/li>\n<li>9 \u2013 Ray Optics and Optical Instruments<\/li>\n<li>10 \u2013 Wave Optics<\/li>\n<li>11 \u2013 Dual Nature of Radiation and Matter<\/li>\n<li>12 \u2013 Atoms<\/li>\n<li>13 \u2013 Nuclei<\/li>\n<li>14 \u2013 Semiconductor Electronic: Material, Devices and Simple Circuits<\/li>\n<li>15 \u2013 Communication Systems<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CHAPTER_15_COMMUNICATION_SYSTEMS\"><\/span>CHAPTER 15 COMMUNICATION SYSTEMS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>15.1 Introduction<\/li>\n<li>15.2 Elements of a Communication System<\/li>\n<li>15.3 Basic Terminology Used in Electronic Communication Systems<\/li>\n<li>15.4 Bandwidth of Signals<\/li>\n<li>15.5 Bandwidth of Transmission Medium<\/li>\n<li>15.6 Propagation of Electromagnetic Waves<\/li>\n<li>15.7 Modulation and its Necessity<\/li>\n<li>15.8 Amplitude Modulation<\/li>\n<li>15.9 Production of Amplitude Modulated Wave<\/li>\n<li>15.10 Detection of Amplitude Modulated Wave<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_class_12_physics_Communication_System\"><\/span>NCERT Solutions class 12 physics Communication System<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>1:\u00a0Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?<\/p>\n<p>(a)\u00a010 kHz<\/p>\n<p>(b)\u00a010 MHz<\/p>\n<p>(c)\u00a01 GHz<\/p>\n<p>(d)\u00a01000 GHz<\/p>\n<p style=\"text-align: justify;\">2:\u00a0Frequencies in the UHF range normally propagate by means of:<\/p>\n<p style=\"text-align: justify;\">(a) Ground waves.<\/p>\n<p style=\"text-align: justify;\">(b) Sky waves.<\/p>\n<p style=\"text-align: justify;\">(c) Surface waves.<\/p>\n<p style=\"text-align: justify;\">(d) Space waves.<\/p>\n<p style=\"text-align: justify;\">3:\u00a0Digital signals<\/p>\n<p style=\"text-align: justify;\">(i) Do not provide a continuous set of values,<\/p>\n<p style=\"text-align: justify;\">(ii) Represent values as discrete steps,<\/p>\n<p style=\"text-align: justify;\">(iii) Can utilize binary system, and<\/p>\n<p style=\"text-align: justify;\">(iv) Can utilize decimal as well as binary systems.<\/p>\n<p style=\"text-align: justify;\">Which of the above statements are true?<\/p>\n<p style=\"text-align: justify;\">(a) (i) and (ii) only<\/p>\n<p style=\"text-align: justify;\">(b) (ii) and (iii) only<\/p>\n<p style=\"text-align: justify;\">(c) (i), (ii) and (iii) but not (iv)<\/p>\n<p style=\"text-align: justify;\">(d) All of (i), (ii), (iii) and (iv).<\/p>\n<p style=\"text-align: justify;\">4:\u00a0Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? A TV transmitting antenna is 81m tall. How much service area can it cover if the receiving antenna is at the ground level?<\/p>\n<p style=\"text-align: justify;\">5:\u00a0 A carrier wave of peak voltage 12 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?<\/p>\n<p style=\"text-align: justify;\">6:\u00a0A modulating signal is a square wave, as shown in Fig. 15.14.<\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" id=\"Picture 2\" style=\"height: 58px; width: 295px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch15\/image010.jpg\" alt=\"14148528959003.jpg\" \/><\/p>\n<p style=\"text-align: justify;\">The carrier wave is given by <img decoding=\"async\" style=\"height: 21px; width: 141px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch15\/image011.png\" \/><\/p>\n<p style=\"text-align: justify;\">(i) Sketch the amplitude modulated waveform<\/p>\n<p style=\"text-align: justify;\">(ii) What is the modulation index?<\/p>\n<p style=\"text-align: justify;\">7:\u00a0 For an amplitude modulated wave, the maximum amplitude is found to be 10 V while the minimum amplitude is found to be 2 V. Determine the modulation index<img decoding=\"async\" style=\"height: 18px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch15\/image020.png\" \/>\u00a0. What would be the value of <img decoding=\"async\" style=\"height: 18px; width: 15px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch15\/image020.png\" \/>\u00a0if the minimum amplitude is zero volt?<\/p>\n<p style=\"text-align: justify;\">8: Due to economic reasons, only the upper sideband of an AM wave is transmitted, but at the receiving station, there is a facility for generating the carrier. Show that if a device is available which can multiply two signals, then it is possible to recover the modulating signal at the receiver station.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_12_Physics\"><\/span><strong>NCERT Solutions for Class 12 Physics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 12 Physics PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 12 physics includes text book solutions from both part 1 and part 2. NCERT Solutions for CBSE Class 12 Physics have total 20 chapters. 12 Physics NCERT Solutions in PDF for free Download on our website. Ncert physics class 12 solutions PDF and physics ncert class 12 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide<\/p>\n<p>To download\u00a0NCERT Solutions for class 12 Physics, Chemistry, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions class 12 physics Communication System Class 12 Physics book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 12 &#8230; <a title=\"NCERT Solutions class 12 physics Communication System\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-communication-system\/\" aria-label=\"More on NCERT Solutions class 12 physics Communication System\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1433],"tags":[283,1342,216,319],"class_list":["post-4436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physics-cbse-class-12","tag-cbse-study-material","tag-class-12","tag-ncert-solutions","tag-physics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions class 12 physics Communication System<\/title>\n<meta name=\"description\" content=\"NCERT Solutions class 12 physics Communication System in PDF format for free download. 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