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JAC Question Bank 2006-2017 :Communication System

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Information about JAC Question Bank 2006-2017 :Communication System
Education

Published on August 22, 2017

Author: bknal1207

Source: authorstream.com

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slide 1: Web : www.ramanujam.org.in Mobile : 09835376044 / 09006365889 Email Id: bknal1207gmail.com Chunna Bhatta KokarRanchi-834001 Jharkhand Page 1 COMMUNICATION SYSTEM FOR CLASS -12 PREVIOUS YEARS QUESTION 2006-2017 Q. NO. QUESTIONS ASKED MARKS YEAR-2017 1. What are the essential element of communication system Explain briefly with block digram. 1+2 YEAR -2016 1. Coaxial cable has a bandwidth of a 750 Hz b 750KHz c 750 MHz d 750GHz 1 2. What is modulation Why modulation is needed 1+2 YEAR-2015 1. What is remote sensing Mention three of its applications. 2 2. What is signal What are the difference types of signal 2 3. What are the different types of modulation 3 YEAR-2014 1. Write the formula for velocity of electromagnetic waves in free space. What are the different modes of propagation of electromagnetic waves 2 2. What is transducer Give one example. 2 3. What is modulation Why modulation is needed What are the different types of modulation 3 YEAR-2013 1. Explain the principle of modem in brief. 2 2. Describe the different modes of sky and space wave propagation in brief. 3 YEAR -2012 1. Why sky wave is not used for transmitting T.V. signal 2 2. What are the essentials of communication system 3 YEAR-2011 1. What do you mean by Amplitude modulation and Frequency modulation YEAR-2010 1. Define amplitude modulation. 2 2. Differentiate between analog and digital communication. 2 PHYSICS CLASSES TARGET: XI / XII / IIT-JEE / MEDICAL JAC QUESTION BANK By : Bharat Bhushan B.K. NAL slide 2: Web : www.ramanujam.org.in Mobile : 09835376044 / 09006365889 Email Id: bknal1207gmail.com Chunna Bhatta KokarRanchi-834001 Jharkhand Page 2 3. Name 6 types of electro-magnetic waves in ascending order of their wavelength. 3 YEAR-2009 1. Write two advantages of digital communication. 2 2. What is the wavelength of a radio station which transmits signal on 560MHz frequency Given c 8 3 10 /sec m  . 2 3. What are the elements of communication system 1 YEAR-2008 1. What is analog signal 1 2. What is modulation Define different types of modulations. 3 3. A T.V. tower has a height of 75m. what is the maximum distance and area up to which this TV transmission can be received on the earth 3 YEAR-2007 1. What are the two functions performed by modem 1 2. Arrange the following in ascending order of frequency: Microwaves ray   ultraviolet rays and radio wave 1 3. Why the sky wave of propagation of electromagnetic waves cannot be used for T.V. transmission Suggest two methods by which range of TV transmission can be increased. 3 4. Deduce an expression for the distance up to which the TV signal can directly be received from the TV tower of height h. 3 YEAR-2006 1. Arrange the following in ascending order of wavelength: Microwaves ray   ultraviolet rays and radio wave 1 2. What type of modulation required for television broadcast 1 3. What do you meant by an optical fiber Explain how does the signal propagate in a fiber 3 4. The height of TV tower is 245m. to how many persons the telecast will reach if the average population density around the tower is 1500 km -2 The radius of the earth is 6.4 x 10 6 m. 3 Note : if any mistake on this kindly inform on the mail id : bknal1207gmail.com Your Observation Our Correction

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