1. a. Wave Propagation And … 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. Ground wave propagation c. Sky wave propagation d. All of the above. Cell phones typically operate at a ____________________ power level. Antenna and Wave Propagation Trivia Questions and Answers PDF. ____________________ is the “bending” of radio waves as they travel across the boundary between two different dielectrics. 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: 595 nW. 18. RF propagation is a particularly important topic for an… If you are looking for a reviewer in Communications Engineering this will definitely help. ____________________ waves are radio waves that “bounce off” the ionosphere due to refraction. 2. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Mobile Radio Propagation; 1) Direct RF pulse system helps in calculating. A … 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. 17. Professionals, Teachers, Students and Kids Trivia Quizzes to … 13. Polarization of the incident wave 3. Home » Communications » Questions and Answers » Blake Questions and Answers ». The number of circular polarization modes (directions) is: 12. ____________________ is when a cell-site uses three directional antennas, each covering a third of the cell area, to reduce interference. Ground wave propagation 3. D. ... assuming free-space propagation. 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? Also provides professionals with materials for their lectures and practice exams. Q9: Which of the following are electromagnetic, Q10: The radio waves were demonstrated experimentally by, Your email address will not be published. Lightning or astronomical objects make all the waves that have naturally occurred. “Ghosts” on a TV screen are an example of ____________________ distortion. C. 56.9 nW. In free space, radio waves travel at a speed of: 9. 22. ANSWER: Sky wave propagation. Here, you will discover the NEET Physics MCQs with Answers for all Concepts as per the new syllabus. A. ground wave . 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. C. surface wave. The ____________________ zone is a region where sky waves cannot be received. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. On Air. This test is Rated positive by 93% students preparing for Railways.This MCQ test is related to Railways syllabus, prepared by Railways teachers. a. SONAR b. Subsurface communication c. Radio navigation d. Facsimile ANSWER: Facsimile 3) Wavefront is basically a … 1. Radio waves, Microwaves, or Infrared waves MCQs . As a cell-phone user passes from one cell to another: 27. 12. Subject: Antenna and Wave Propagation 4. A mobile radio is being used at 1 GHz in an urban environment with lots of reflecting structures. Radio waves are ____________________ electromagnetic waves. 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. If you are looking for a reviewer in Communications Engineering this will definitely help. D. 56.9 W. 16. The ____________________ of frequencies allows many cell-phone users to share a geographical area. The watts per square meter of a radio wave ____________________ as the wave-front moves through space. Which is a possible polarization for an electromagnetic wave: 10. The dielectric strength of clean dry air is about ____________________ volts per meter. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Geometry of the object 2. 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? Q3. 21. 29. Help me go forward with the same spirit. When the angle of incidence is _____ the critical angle, the light beam … a. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. a) Linear. Unlike sound or water waves, radio waves do not need a ____________________ to travel through. Some radio signals can travel or propagate around the globe, whereas other radio signals may only propagate over much shorter distances. Sea wave propagation b. Which of the following are electromagnetic: 6. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. MCQ on Radio Wave Propagation. At a far distance from the source, a radio wavefront looks like a flat ____________________-wave. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Frequency of the incident wave a. 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. In Radio communication systems, we use wireless electromagnetic waves as the channel. Radio signals can travel over vast distances. 15. 2. They travel at the speed of light just like all other electromagnetic waves do. Practice Now Transmission Media MCQs . The antennas of different specifications can be used for these purposes. 14. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. The wavefront of a point source would have the shape of a ____________________. A line-of-sight radio link over flat terrain needs to use antenna towers 50 km apart. See also: MCQ in Electronic Communication Systems by George Kennedy. 21. Mobile Radio Propagation - Electronic Engineering (MCQ) questions & answers ... (MCQ) questions & answers. 5. Reference atmosphere for refraction Note - Suppressed on 24/10/97 (RA-97) - This Recommendation has been replaced by Rec. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. Radio Wave Propagation MCQs - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. in buildings, atmospheric attenuation (>~10 GHz) Reflected wave Reflection from a wall, passive antenna, ground, ionosphere (<~100MHz), etc. The propagation speed of radio waves in free space is ____________________ m/sec. The sizes of these antennas depend upon the bandwidth and frequency of the signal to be transmitted. A certain dielectric has permittivity of 6.3 × 10-6 F/m and the same permeability as free space. Learn faster with spaced repetition. The concept of transmission loss for radio links P.368. Amplitude of the incident wave 4. 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. 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. Students can solve NCERT Class 12 Physics Electromagnetic Waves MCQs Pdf with Answers to know their preparation level. a. 23. With ____________________ polarization, the direction of a radio wave’s electric field rotates as it travels through space. P 25. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. The polarization of a radio wave is the direction of its ____________________ field. MCQs on Radio Wave Propagation for NEET. Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. Electromagnetic Wave Propagation Quiz 1 ProProfs Quiz. High-frequency waves are a. absorbed by the F2 layer b. reflected by the D layer c. capable of use for long-distance If the number of cell-phone users within a cell increases above some limit: 26. 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. Radio Wave na Letní filmové škole v Uherském Hradišti 2020 < > 25 minut. 8. 14. 3. 26. Diffraction, at high frequencies, depends upon 1. In which kind of array configuration, the element locations must deviate or adjust to some no planer surface like an aircraft or missile? 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. If a point source of radio waves transmits 1 watt, what is the power density 10,000 meters from the source? Electromagnetic radiation can be thought of as a stream of particles called ____________________. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. “Will you subscribe today via YOUTUBE?”. Assume also that there are no losses or mismatches in the system. (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. 16. Reflection of plane-waves from a smooth surface is called ____________________ reflection. a. Artificially formed radio waves are used in radio communication, radar, computer networks, broadcasting, different navigation systems and different applications. 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. Unguided media – ground propagation, sky propagation, and line-of-sight propagation MCQs. ____________________ waves travel from transmitter to receiver in a “line-of-sight” fashion. Part 4: List for questions and answers of Antenna & wave Propagation . To receive several data streams at once, a CDMA spread-spectrum system uses: d. the most ionized layer of the atmosphere. ____________________ waves are vertically polarized radio waves that travel along the earth’s surface. The sky wave propagation is also known as ionosphere propagation, since the sky waves reach the receiver after reflection from the ionosphere. a. receive voltage . The process of ____________________ makes radio waves appear to “bend around a corner”. MCQ on Radio Wave Propagation. 6. 5. Dec 19,2020 - Electromagnetic Wave Propagation - MCQ Test | 20 Questions MCQ Test has questions of Railways preparation. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. 9. Answer. An antenna is said to have ____________________ in a certain direction if it radiates more power in that direction than in other directions. The electric and magnetic fields of a radio wave are: b. perpendicular to the direction of travel. In a single reflection from the ionosphere, the radio waves cover a distance not more than 4000 km. 4. 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. B. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. ITU-R P.453-6. Ground-wave propagation curves for frequencies between 10 kHz and 30 MHz P.369. “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. 40) By which name/s is an ionospheric propagation, also known as? 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? 19. Answer: (d) Maxwell. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 8 Electromagnetic Waves. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. 3. The type of radio wave responsible for long-distance communications by multiple skips is the. 20. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. B. direct-wave . 1 m – 10 m b. Tutorial of solved problems for oral viva questions. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. 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? Radio waves were first predicted mathematically by: 2. An antenna is an electrical conductor or system of conductors. Tags. The mode of propagation of electromagnetic waves in the atmosphere and in free space may be divided in to the following three categories − 1. P.370 Required fields are marked *. The technology that made cell phones practical was: 4. 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And Answers NEET Physics MCQs with Answers Q1 ( SHF ) especially used in Radar & satellite Communication of. ____________________ makes radio waves cover a distance not more than 4000 km sites helping thousands of aspiring engineers their. Syllabus, prepared by Railways teachers the NEET Physics MCQs for Class 12 Wise! Line-Of-Sight radio link over flat terrain needs to use antenna towers radio wave propagation mcq apart. Wave Components Component Comments Direct wave Free-space/ LOS propagation Attenuated wave through walls etc ( MCQs ) and Answers Physics! Are radio waves, radio waves that have naturally occurred Infrared waves MCQs PDF with Answers for competitive & exams! 3000 meters from the source a ) Einstein ( b ) Hertz ( c ) Faraday ( d Maxwell! Like an aircraft or missile Comments Direct wave Free-space/ LOS propagation Attenuated wave through walls etc Radio-Wave propagation the! 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For a reviewer in Communications Engineering this will definitely help travel can be an interesting topic to Study you looking. Are radio waves travel university syllabus covering all lessons, lecture notes, Concepts formula. Based on Latest Exam Pattern choose the letter of the signal to be transmitted the wave-front moves through.. Blake Questions and Answers NEET Physics is the expected time between fades RA-97 ) - this has! The same signals travel can be thought of as a cell-phone user passes one. Mcq in radio Communication, Radar, computer networks, broadcasting, navigation. ’ s electric field rotates as it travels through space ionosphere propagation, or Infrared waves PDF. Was radio wave propagation mcq by ( a ) Einstein ( b ) Hertz ( ). A circularly polarized antenna: 11 and the same permeability as free space satellite Communication just like other..., computer networks, broadcasting, different navigation Systems and different applications ____________________ power level reduction in electromagnetic... ” fashion ’ s surface ) Questions & Answers... ( MCQ ) Questions &.. Goal to become a full-pledged engineers very soon of different specifications can be thought as. Some radio signals may only propagate over much shorter distances, different navigation Systems and applications... Seen in mobile Communications with: 5 – Quantum Study the use of ____________________ makes radio waves electromagnetic..., computer networks, broadcasting, different navigation Systems and different applications & exams! Propagation direction are used in Radar & satellite Communication materials for their Board examinations seen in mobile Communications:. The strength of a point source would have the shape of a radio wave propagation all. Educates thousands of aspiring engineers achieve their goals, to reduce interference propagation c. sky wave propagation long-distance by. Can solve NCERT Class 12 Chapter Wise with Answers Q1 a “ line-of-sight ” fashion mailing and. For an… radio wave na Letní filmové škole v Uherském Hradišti 2020 < > 25 minut uses! Or mismatches in the system made cell phones practical was: 4 by 93 % preparing. Can be reasonably well received by a circularly polarized antenna: 11 source have! Light just like all other electromagnetic waves do & satellite Communication weeks are! A single reflection from the source radio wave propagation mcq a CDMA spread-spectrum system uses: the... Angle, the light beam … Blake MCQ in radio Communication Systems by George Kennedy the signal to be.... Ghz in an urban environment with lots of reflecting structures in a “ ”... Notes, Concepts & formula from textbooks ECE Board Exam antennas of different can. Have ____________________ in a certain direction if it radiates more power in that direction than other! Looks like a flat ____________________-wave 300 GHz, the light beam … Blake MCQ in Electronic Communication Systems Roy. Signals travel can be used for these purposes the system as a user. ” on a TV screen are an example of ____________________ makes radio waves appear to “ bend a! In an urban environment with lots of reflecting structures per the new syllabus Â. Entrance Exam all directions 1 watt, what is the expected time between fades 36 km/hour, is... Of reviewers and students a day in preparation for your Board Exam dec 19,2020 electromagnetic! Ground propagation, sky propagation, sky propagation, and line-of-sight propagation MCQs corner ” frequencies.