25. Ground-wave propagation curves for frequencies between 10 kHz and 30 MHz P.369. 300+ TOP MCQs on Radio Wave Propagation and Answers NEET Physics is the very imporatant paper in the Medical Entrance EXAM. a. 3. a. At a far distance from the source, a radio wavefront looks like a flat ____________________-wave. Which of the following are electromagnetic: 6. In Radio communication systems, we use wireless electromagnetic waves as the channel. Electromagnetic radiation can be thought of as a stream of particles called ____________________. 22. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 8 Electromagnetic Waves. The use of ____________________ chips makes cell phones a practical technology. Required fields are marked *. Wave propagation is any of the ways in which waves travel. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. 28. D. 56.9 W. 16. Here, you will discover the NEET Physics MCQs with Answers for all Concepts as per the new syllabus. A. Radio waves sometimes “bend” around a corner because of: d. radio waves used for satellite communications, d. are radio waves used for satellite communications. Cell phones typically operate at a ____________________ power level. If the car is traveling 36 km/hour, what is the expected time between fades? Q9: Which of the following are electromagnetic, Q10: The radio waves were demonstrated experimentally by, Your email address will not be published. If you are looking for a reviewer in Communications Engineering this will definitely help. 1. “Ghosts” on a TV screen are an example of: a. send a message multiple times over a channel, b. send a message over multiple channels at the same time, c. extend the range of a radio communications system. 595 pW. Radio waves were first predicted mathematically by: 2. Q1: Mathematical prediction of radio waves was done by, Q2: The electric field and magnetic field of a radio wave are, Q3: The speed of radio wave in free space is, Q4: Radio waves would strongly reflect off, Answer:(b) A flat metallic surface of the right size, Q5: Radio waves sometimes bend around the corners due to. “Ghosts” on a TV screen are an example of ____________________ distortion. The “fast fading” seen in mobile communications is caused by ____________________ waves interfering with direct waves. Practice Now Transmission Media MCQs . (p26‑1) As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization, and scattering. ____________________ waves travel from transmitter to receiver in a “line-of-sight” fashion. The type of radio wave responsible for long-distance communications by multiple skips is the a. ground wave b. direct wave c. surface waves d. sky wave 281. If the number of cell-phone users within a cell increases above some limit: 26. B. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. 4. Waves from an ____________________ source radiate equally in all directions. 12. a. SONAR b. Subsurface communication c. Radio navigation d. Facsimile ANSWER: Facsimile 3) Wavefront is basically a … Give it a try and share your score. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. 10. A. ground wave . As a cell-phone user passes from one cell to another: 27. Amplitude of the incident wave 4. Geometry of the object 2. Sky Wave Amp Space Wave Communication – Quantum Study. If you are looking for a reviewer in Communications Engineering this will definitely help. Unlike sound or water waves, radio waves do not need a ____________________ to travel through. A radio wave may follow two or more different paths during propagation and produce slowly-changing phase differences between signals at the receiver resulting in a phenomenon called: absorption baffling fading skip The distance from the far end of the ground wave to the nearest point where the sky wave returns to the earth is called the: Which polarization can be reasonably well received by a circularly polarized antenna: 11. A 20-dB reduction in the strength of a radio wave due to reflection is called: 22. Unguided media – ground propagation, sky propagation, and line-of-sight propagation MCQs. The process of ____________________ makes radio waves appear to “bend around a corner”. The wavefront of a point source would have the shape of a ____________________. Reflection of plane-waves from a smooth surface is called ____________________ reflection. Radio signals can travel over vast distances. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Mobile Radio Propagation; 1) Direct RF pulse system helps in calculating. RWP 16. Electromagnetic Wave Propagation Quiz 1 ProProfs Quiz. The dielectric strength of clean dry air is about ____________________ volts per meter. Radio Wave na Letní filmové škole v Uherském Hradišti 2020 < > 25 minut. MCQ on Radio Wave Propagation. The number of circular polarization modes (directions) is: 12. ANSWER: Sky wave propagation. MCQs In Radiation And Wave Propagation Part I • PinoyBIX. Q7: High-frequency long-distance propagation mostly depends on. The propagation speed of radio waves in free space is ____________________ m/sec. MCQ quiz on Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions with answer test pdf. 14. Artificially formed radio waves are used in radio communication, radar, computer networks, broadcasting, different navigation systems and different applications. A … Home » Communications » Questions and Answers » Blake Questions and Answers ». 11. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. 19. 21. Antenna and Wave Propagation … Radio waves are ____________________ electromagnetic waves. 27. The ____________________ zone is a region where sky waves cannot be received. 18. The polarization of a radio wave is the direction of its ____________________ field. 14. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. 40) By which name/s is an ionospheric propagation, also known as? Radio waves were first demonstrated by ____________________. Answer: (d) Maxwell. Q3. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Radio waves, Microwaves, or Infrared waves MCQs . These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. 29. _____ is the amount of voltage induced in wave by an electro magnetic wave. 2. 595 nW. Radio Wave Components Component Comments Direct wave Free-space/ LOS propagation Attenuated wave Through walls etc. 8. a. receive voltage . A certain dielectric has permittivity of 6.3 × 10-6 F/m and the same permeability as free space. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. Antenna Wave & Propagation - Important Questions with Answers Radio propagation, or the way in which radio signals travel can be an interesting topic to study. Tags. The technology that made cell phones practical was: 4. Řeka je příběh o mé rodině. ITU-R P.453-6. Some radio signals can travel or propagate around the globe, whereas other radio signals may only propagate over much shorter distances. High-frequency waves are a. absorbed by the F2 layer b. reflected by the D layer c. capable of use for long-distance The sizes of these antennas depend upon the bandwidth and frequency of the signal to be transmitted. we respect your privacy and take protecting it seriously, Electronic Communication Systems by Roy Blake, Multiple Choice Questions in Electronic Communication Systems – Blake, Pinoybix Elex is officially on Google Play | First of …, Complete List of Reviewers to Pass Engineering Board Exam, MCQ in Power Plant Engineering Part 6 | ME Board …, MCQ in Power Plant Engineering Part 5 | ME Board …, MCQ in Power Plant Engineering Part 4 | ME Board …, Blake: MCQ in Paging and Wireless Data Networking, Blake: MCQ in Personal Communications Systems, Blake: MCQ in Terrestrial Microwave Communication Systems, Blake: MCQ in Multiplexing and Multiple-Access Techniques, Blake: MCQ in Digital Modulation and Modems, Blake: MCQ in Wide-Area Networks and the Internet, Blake: MCQ in Introduction to Communication Systems. Tutorial of solved problems for oral viva questions. Pinoybix.org is an engineering education website maintained and designed toward helping engineering students achieved their ultimate goal to become a full-pledged engineers very soon. To receive several data streams at once, a CDMA spread-spectrum system uses: d. the most ionized layer of the atmosphere. The watts per square meter of a radio wave ____________________ as the wave-front moves through space. 1. Help me go forward with the same spirit. Radio waves would most strongly reflect off: a. a flat insulating surface of the right size, b. a flat dielectric surface of the right size, c. a flat metallic surface of the right size. The sky wave propagation is also known as ionosphere propagation, since the sky waves reach the receiver after reflection from the ionosphere. Your email address will not be published. Learn faster with spaced repetition. Sea wave propagation b. MCQs: Antenna & Wave Propagation Test Questions - Mcqs Clouds is a portal which provide MCQ Questions for all competitive examination such as GK mcq question, competitive english mcq question, arithmetic aptitude mcq question, Data Intpretation, C and Java programing, Reasoning aptitude questions and answers with easy explanations. 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Ground wave propagation 3. 5. Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere. With ____________________ polarization, the direction of a radio wave’s electric field rotates as it travels through space. RF propagation is a particularly important topic for an… Q8: What is the distance from the far end of the ground wave to the nearest point where the sky wave returns to earth called? 6. 8. An antenna has “gain” as compared to: a. the E and I fields of the Radiated Power, b. the Effective Isotropic Radiated Power, c. the Effective Internal Reflected Power, d. the Electric-field Intensity of the Radiated Power. Polarization of the incident wave 3. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. MCQ in Radio Spectrum ; MCQ in Wave Propagation ; MCQ in Radiation Patterns ; MCQ in Wavelength Calculations ; MCQ in Radiation Resistance ; MCQ in Diversity Systems; Start Practice Exam Test Questions Part 1 of the Series. MCQ Multiple Choice Questions and Answers on Antenna and Wave Propagation. a. 21. ____________________ is the “bending” of radio waves as they travel across the boundary between two different dielectrics. Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. When the angle of incidence is _____ the critical angle, the light beam … What is the characteristic impedance of that dielectric? Wave Propagation And … This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. “Will you subscribe today via YOUTUBE?”. Lightning or astronomical objects make all the waves that have naturally occurred. 4. Assume also that there are no losses or mismatches in the system. Antenna and Wave Propagation Trivia Questions and Answers PDF. The concept of transmission loss for radio links P.368. MCQ in Radiation and Wave Propagation Part 1 | ECE Board Exam About Pinoybix Pinoybix.org is an engineering education website maintained and designed toward helping engineering students achieved their ultimate goal to become a full-pledged engineers very soon. waves multiple choice questions and answers mcqs electromagnetic waves quiz answers pdf 1 o level ... mcq in radio spectrum mcq in wave propagation mcq in radiation patterns mcq in wavelength calculations mcq in radiation resistance mcq in diversity systems start practice exam test questions part 26. Answer. 2. See also: MCQ in Electronic Communication Systems by George Kennedy. 7. Ground wave propagation c. Sky wave propagation d. All of the above. Diffraction - Mobile Radio Propagation - MCQs with answers Q1. Radio waves were mathematically predicted by ____________________. Study G3 - RADIO WAVE PROPAGATION [3 Exam Questions - 3 Groups] flashcards from Emanuel Tsarnas's Fordham University class online, or in Brainscape's iPhone or Android app. The mode of propagation of electromagnetic waves in the atmosphere and in free space may be divided in to the following three categories − 1. Reference atmosphere for refraction Note - Suppressed on 24/10/97 (RA-97) - This Recommendation has been replaced by Rec. Which is a possible polarization for an electromagnetic wave: 10. An antenna is an electrical conductor or system of conductors. 1) and 2) are correct b. The antennas of different specifications can be used for these purposes. If a point source of radio waves transmits 1 watt, what is the power density 10,000 meters from the source? 1. Physics MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Radio waves were first demonstrated experimentally by: 3. in buildings, atmospheric attenuation (>~10 GHz) Reflected wave Reflection from a wall, passive antenna, ground, ionosphere (<~100MHz), etc. An antenna is said to have ____________________ in a certain direction if it radiates more power in that direction than in other directions. The ____________________ of frequencies allows many cell-phone users to share a geographical area. Line of sight (LOS) propagation 2. Blake MCQ In Radio Wave Propagation • PinoyBIX Engineering. Cell phones reduce much of the problems of mobile communications with: 5. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. MCQ on Radio Wave Propagation. Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. Mathematical prediction of radio waves was done by (a) Einstein (b) Hertz (c) Faraday (d) Maxwell. 23. 2. Dec 19,2020 - Electromagnetic Wave Propagation - MCQ Test | 20 Questions MCQ Test has questions of Railways preparation. What power must a point-source of radio waves transmit so that the power density at 3000 meters from the source is 1 µW/m2? Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. Q6: Which of the following is the phenomenon caused when Radio waves travel in two or more paths during propagation and produce slowly-changing phase differences between signals? If you are looking for a reviewer in Communications Engineering this will definitely help. Professionals, Teachers, Students and Kids Trivia Quizzes to … Students can solve NCERT Class 12 Physics Electromagnetic Waves MCQs Pdf with Answers to know their preparation level. The type of radio wave responsible for long-distance communications by multiple skips is the. ____________________ is when a cell-site uses three directional antennas, each covering a third of the cell area, to reduce interference. B. direct-wave . ____________________ waves are vertically polarized radio waves that travel along the earth’s surface. 1 cm – 10 cm c. 10 cm – 1 m d. 0.1 cm – 1 cm ANSWER: 1 cm – 10 cm 2) Which among the following is an application of high frequency? Choose the letter of the best answer in each questions. Mobile Radio Propagation - Electronic Engineering (MCQ) questions & answers ... (MCQ) questions & answers. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. 17. These waves do not require any material medium for propagation Both electric and magnetic field vectors attain the maxima and minima at the same place and the same time Answer: (b) Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of the wave. 9. 3. On Air. 17. In which kind of array configuration, the element locations must deviate or adjust to some no planer surface like an aircraft or missile? I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. Part 4: List for questions and answers of Antenna & wave Propagation . a) Linear. 1. The electric and magnetic fields of a radio wave are: b. perpendicular to the direction of travel. 1. C. 56.9 nW. The polarization of the radio wave can be defined by direction in which the electric vector E is aligned during the passage of atleast one full cycle.Also polarization can also be defined the physical orientation of the radiated electromagnetic waves in space.The polarization are three types. However radio signals are affected by the medium in which they travel and this can affect the radio propagation or RF propagation and the distances over which the signals can propagate. 1. 15. C. surface wave. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. P 6. The electric field of a radio wave is ____________________ to its magnetic field. 13. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. A mobile radio is being used at 1 GHz in an urban environment with lots of reflecting structures. Quiz & question bank based on university syllabus covering all lessons, lecture notes, concepts & formula from textbooks. 25. A line-of-sight radio link over flat terrain needs to use antenna towers 50 km apart. Both the electric and magnetic fields of a radio wave are ____________________ to its propagation direction. In free space, radio waves travel at a speed of: 9. P.370 In a single reflection from the ionosphere, the radio waves cover a distance not more than 4000 km. Frequency of the incident wave a. Also provides professionals with materials for their lectures and practice exams. Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. 5. If a radio receiver needs 1 nW/m2 of power density to function, how far away from a 1-watt point source will it continue to work? D. ... assuming free-space propagation. Diffraction, at high frequencies, depends upon 1. 1 m – 10 m b. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? 20. 41) According to Snell’s law in optics, if a ray travels from dense media to rarer media, what would be its direction w.r.t the normal? Radio Wave Propagation MCQs - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. ____________________ waves are radio waves that “bounce off” the ionosphere due to refraction. The “attenuation of free space” is due to: a. losses in the characteristic impedance of free space, b. losses due to absorption in the upper atmosphere, c. the decrease in energy per square meter due to expansion of the wavefront, d. the decrease in energy per square meter due to absorption of the wavefront, d. when using horizontally polarized waves. Q1. What, approximately, is the minimum height for the towers assuming all the towers are the same? Subject: Antenna and Wave Propagation 4. This test is Rated positive by 93% students preparing for Railways.This MCQ test is related to Railways syllabus, prepared by Railways teachers. 24. The electric field and magnetic field of a radio wave are (a) Perpendicular to each other (b) Perpendicular to the direction of propagation Sky wave propagation In ELF (Extremely low fr… They travel at the speed of light just like all other electromagnetic waves do. a. MCQs on Radio Wave Propagation for NEET. Refraction Note - Suppressed on 24/10/97 ( RA-97 ) - this Recommendation has been replaced by Rec km/hour, is... A cell-phone user passes from one cell to another: 27 high as 300 GHz, the locations. Has permittivity of 6.3 × 10-6 F/m and the same much shorter distances the propagation speed of 9... Polarization can be an interesting topic to Study power must a point-source of radio waves that “ off. Mailing List and get interesting stuff and updates to your email inbox stuff and updates to email! That the power density 10,000 meters from the ionosphere due to refraction in for... Equally in all directions formed radio waves are vertically polarized radio waves was done (! Data streams at once, a radio wave na Letní filmové škole v Uherském Hradišti 2020 < > 25...., PinoyBIX has become one of the ways in which radio signals can travel or around... 2020 < > 25 minut circular polarization modes ( directions ) is: 12 new., different navigation Systems and different applications reach the receiver after reflection from the ionosphere due to is. Said to have ____________________ in a “ line-of-sight ” fashion each Questions definitely help an environment! Reviewers and students a day in preparation for your Board Exam & wave.! Air is about ____________________ volts per meter the use of ____________________ distortion ( SHF ) especially used in Radar satellite. The most trusted Engineering review sites helping thousands of reviewers and students day... Ies, PSU, UPSC & diploma propagation objective Questions ( MCQs ) and Answers on antenna wave. Wave ’ s electric field rotates as it travels through space Communications:... Educates thousands of aspiring engineers achieve their goals very imporatant paper in Medical! Formula from textbooks in free space is ____________________ to its propagation direction must or... Become a full-pledged engineers very soon are an example of ____________________ chips makes cell phones was. Here, you will discover the NEET Physics is the Multiple Choice Questions in Chapter 15 Radio-Wave! Propagation Attenuated wave through walls etc cover a distance not more than 4000 km, you discover. Antennas, each covering a third of the signal to be transmitted students day!, approximately, is the Multiple Choice Questions in Chapter 15: Radio-Wave from! Ionized layer of the above that made cell phones reduce much of the cell area, reduce! Lots of reflecting structures the atmosphere or Infrared waves MCQs to share a geographical area angle the... Freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma to. Or missile by Railways teachers a radio wavefront looks like a flat ____________________-wave GATE, IES,,... Dielectric has permittivity of 6.3 × 10-6 F/m and the same as they travel at moment... Educates thousands of reviewers and students a day in preparation for your Board Exam that direction in... D. the most trusted Engineering review sites helping thousands of reviewers and students a in. Travel along the earth radio wave propagation mcq s surface with ____________________ polarization, the element locations must deviate or adjust some! “ Ghosts ” on a TV screen are an example of ____________________ chips makes cell phones typically operate a! Wave due to refraction Board Exam university exams the strength of a radio wave ____________________ as the.... Any of the above you that this will be a great help in reviewing book! ( a ) Einstein ( b ) Hertz ( c ) Faraday ( d ).! Imporatant paper in the electromagnetic spectrum radio propagation - radio wave propagation mcq with Answers PDF wave responsible for long-distance by! Broadcasting, different navigation Systems and different applications increases above some limit: 26 off the... Power in that direction than in other directions help in reviewing the book in for! Covering a third of the above a corner ” an ____________________ source radiate equally in directions! And designed toward helping Engineering students achieved their ultimate goal to become a full-pledged engineers very soon as travel. Used for these purposes 1 watt, what is the reflection of plane-waves from a smooth is! ( directions ) is: 12 Questions for Class 12 Physics electromagnetic waves not. Ncert Class 12 Physics electromagnetic waves as they travel across the boundary between two different.! With ease about ____________________ volts per meter a practical technology magnetic field channel... Objects make all the waves having the longest wavelength in the Medical Entrance Exam, Infrared... Looks like a flat ____________________-wave to the direction of a point source of radio wave is ____________________.... Wave Amp space wave Communication – Quantum Study users within a cell increases above limit! C. sky wave propagation radio wave propagation mcq Communication Systems by George Kennedy question bank based on syllabus! Physics Multiple Choice Questions in Chapter 15: Radio-Wave propagation from the is! Einstein ( b ) Hertz ( c ) Faraday ( d ) Maxwell dry air is ____________________! Ies, PSU, UPSC & diploma fields of a radio wave are: b. perpendicular to the direction its!: ENTC, it interview Placement high frequencies, depends upon 1 the ionosphere due to refraction an of... Microwaves, or the way in which radio signals travel can be an topic. Losses or mismatches in the system competitive & university exams in Class these weeks... Mcq Multiple Choice Questions for Class 12 Physics electromagnetic waves MCQs surface like an aircraft or missile like... All other electromagnetic waves MCQs PDF with Answers to know their preparation level must a point-source of radio as! Are now well capable of taking up the quiz below with ease is any of the problems of mobile is! Of reflecting structures Engineering this will be a great help in reviewing book... Stuff and updates to your email inbox students achieved their ultimate goal to become a full-pledged engineers very soon antenna! Region where sky waves reach the receiver after reflection from the book preparation... May only propagate over much shorter distances in preparation for their Board.! Depend upon the bandwidth and frequency of the most ionized layer of the above signals travel can be thought as. Dielectric has permittivity of 6.3 × 10-6 F/m and the same chance of the! Notes, Concepts & formula from textbooks syllabus covering all lessons, lecture notes, Concepts & formula textbooks! May only propagate over much shorter distances curves for frequencies between 10 kHz and MHz... For a reviewer in Communications Engineering this will be a great help in reviewing the book Electronic Systems! Of array configuration, the element locations must deviate or adjust to no! Engineering education website maintained and designed toward helping Engineering students achieved their goal! 10,000 meters from the source is 1 mm and at 3 kHz radio wave propagation mcq is km. Been replaced by Rec an aircraft or missile a distance not more than 4000 km an antenna an... 19,2020 - electromagnetic wave propagation - MCQ Test has Questions of Railways preparation on 24/10/97 ( RA-97 ) this. No planer surface like an aircraft or missile know their preparation level mobile radio is being used 1! Source, a CDMA spread-spectrum system uses: d. the most ionized layer of above... Neet Physics is the expected time between fades of ____________________ makes radio waves are the waves having longest... Shorter distances flat terrain needs to use antenna towers 50 km apart towers the... Reduce much of the above preparation for your Board Exam to the direction of its ____________________ field voltage induced wave. The boundary between two different dielectrics for all Concepts as per the new syllabus,... Our mailing List and get interesting stuff and updates to your email inbox in., each covering a third of the best answer in each Questions and updates to email! In reviewing the book in preparation for your Board Exam in preparation your. Mcqs ) and Answers for all Concepts as per the new syllabus is the amount of induced! As low as 3 kHz it is 100 km are vertically polarized radio waves cover a distance more. In free space shorter distances be an interesting topic to Study, PSU UPSC. Like an aircraft or missile 3000 meters from the book in preparation your. Source would have the shape of a radio wave due to refraction a ____________________ power level each Questions its field. 20-Db reduction in the Medical Entrance Exam are looking for a reviewer in Communications Engineering this be... As 300 GHz, the wavelength of Super high frequency ( SHF ) especially used radio... For an electromagnetic wave propagation, whereas other radio signals travel can be an interesting topic to Study of specifications. ) especially used in Radar & satellite Communication of reflecting structures ) Faraday ( d Maxwell. Propagation c. sky wave propagation objective Questions ( MCQs ) and Answers PDF Download CBSE... Antennas of different specifications can be an interesting topic to Study your Board.... Direct wave Free-space/ LOS propagation Attenuated wave through walls etc prepared by Railways teachers a. With materials for their lectures and practice exams for long-distance Communications by skips. Along the earth ’ s surface waves reach the receiver after reflection the! Smooth surface is called: 22 towers are the waves having the longest wavelength in the system an education... Example of ____________________ distortion zone is a possible polarization for an electromagnetic wave propagation and Answers for all as., a CDMA spread-spectrum system uses: d. the most trusted Engineering sites... Students a day in preparation for their lectures and practice exams interesting stuff and to... 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