Physics - Communication System
Practise 25 AIIMS previous year questions on Communication System, compiled from papers spanning 2003 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.
Communication System has been asked in 12 of the 19 years of AIIMS papers analysed (2001–2019), with 25 questions in all. 68% of them were easy, 28% moderate and 4% tough. Most of its questions came from 2018, with 4 questions that year. In the last three years (2017–2019) it had 5 questions across 5 papers, about 1 per paper.
The chapter's 3 topics are not weighted equally: Propagation of EM Waves (14 questions, 56%), Modulation (8 questions, 32%), and Communication System (3 questions, 12%) have been asked the most. Propagation of EM Waves has produced the most tough questions (1).
- 1Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signa25 May, 2019Propagation of EM Waves
- 2A ground receiver receives a signal at , transmitted by a ground transmitter at a height of , which is away from it. Then it can communicate27 May, 2018Propagation of EM Waves
- 3If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be27 May, 2018Modulation
- 4Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave sign27 May, 2018Propagation of EM Waves
- 5In an amplitude modulated signal the maximum amplitude is 15 volt and minimum amplitude is 5 volt, then amplitude of modulating wave will be26 May, 2018Modulation
- 6Assertion : Electromagnetic waves with frequencies smaller than the critical frequencies of ionosphere cannot be used for communication usin2015Propagation of EM Waves
- 7Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave sign2014Propagation of EM Waves
- 8Assertion : Short wave communication over long distance is not possible via ground waves. Reason: The ground waves can bend round the corner2014Propagation of EM Waves
- 9For satellite communication which wave is used ?2013Propagation of EM Waves
- 10If modulation index is and power of carrier wave is . Then what will be the total power in modulated wave?2013Modulation
- 11Long distance communication between two point on earth is achieved by2013Propagation of EM Waves
- 12Assertion : In a communication system based on amplitude modulation the modulation index is kept . Reason : It ensures minimum distortion of2013Modulation
- 13Voltage of modulating wave of with frequency was superimposed on carrier wave of frequency and voltage then the modulation index is2011Modulation
- 14The area covered by a transmitting antenna of height is2011Modulation
- 15Assertion : In the transmission of long distance radio signals, short wave band is used. Reason : In shorter wavelength, attenuation is very2011Propagation of EM Waves
- 16Assertion : Communication in UHF/VHF regions can be established by space wave or tropospheric wave. Reason : Communication in UHF/VHF region2010Propagation of EM Waves
- 17Assertion : Diode lasers are used as optical sources in optical communication. Reason : Diode lasers consume less energy.2008Communication System
- 18If the highest modulating frequency of the wave is \(5 {~kHz}\), the number of stations that can be accomodated in a \(150 {~kHz}\) bandwidt2007Communication System
- 19In communication with help of antenna if height is doubled then the range covered which was initially \(r\) would become2007Modulation
- 20Assertion : Electromagnetic waves with frequencies smaller than the critical frequency of ionosphere are used for communication using sky wa2006Propagation of EM Waves
- 21For skywave propagation of a signal, what should be the minimum electron density in ionosphere?2005Propagation of EM Waves
- 22Assertion : Television signals are received through sky-wave propagation. Reason : The ionosphere reflects electromagnetic waves of frequenc2005Propagation of EM Waves
- 23The maximum distance upto which TV transmission from a TV tower of height can be received is proportional to2003Modulation
- 24In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron den2003Propagation of EM Waves
- 25Assertion : Microwave communication is preferred over optical communication. Reason : Microwaves provide large number of channels and bandwi2003Communication System
Frequently Asked Questions
1.How many questions are available for Communication System?
This chapter includes 25 questions compiled from AIIMS papers spanning 2003 to 2019.
2.Are these questions only from AIIMS, or from other exams too?
These are AIIMS questions specifically for the Communication System chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.
3.Is Communication System an important chapter for AIIMS Physics?
Communication System has appeared in 12 of the 19 years of AIIMS papers covered here, with 25 questions across 13 papers - about 2 per paper it appears in.
4.What is the difficulty level of Communication System questions in AIIMS?
Of the 25 questions analysed for this chapter, 68% are easy, 28% moderate and 4% tough. 2018 had the most, with 4 questions.
5.Which topics in Communication System should I focus on?
These topics have carried the most weightage in Communication System:
- Propagation of EM Waves - 14 questions (56%)
- Modulation - 8 questions (32%)
- Communication System - 3 questions (12%)
- Propagation of EM Waves has produced the most tough questions (1).
6.Is Communication System's weightage in AIIMS going up or down?
Across all 13 papers analysed, Communication System has averaged about 1.9 questions per paper. In the last three years (2017–2019), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.