Sky wave propagation In ELF (Extremely low fr… Radio propagation, or the way in which radio signals travel can be an interesting topic to study. D. 56.9 W. 16. 26. In free space, radio waves travel at a speed of: 9. The ____________________ zone is a region where sky waves cannot be received. Radio waves were first predicted mathematically by: 2. What is the characteristic impedance of that dielectric? 8. a) Linear. 9. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. Wave propagation is any of the ways in which waves travel. 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. 2. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. 595 nW. 1 m – 10 m b. 1. See also: MCQ in Electronic Communication Systems by George Kennedy. Lightning or astronomical objects make all the waves that have naturally occurred. 27. Unlike sound or water waves, radio waves do not need a ____________________ to travel through. a. Physics MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. 25. 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. 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. 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: Assume also that there are no losses or mismatches in the system. The sizes of these antennas depend upon the bandwidth and frequency of the signal to be transmitted. Polarization of the incident wave 3. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Give it a try and share your score. Ground wave propagation 3. 10. The dielectric strength of clean dry air is about ____________________ volts per meter. Answer: (d) Maxwell. ____________________ is when a cell-site uses three directional antennas, each covering a third of the cell area, to reduce interference. Radio Wave Components Component Comments Direct wave Free-space/ LOS propagation Attenuated wave Through walls etc. Amplitude of the incident wave 4. Geometry of the object 2. Which of the following are electromagnetic: 6. Both the electric and magnetic fields of a radio wave are ____________________ to its propagation direction. Diffraction, at high frequencies, depends upon 1. Mobile Radio Propagation - Electronic Engineering (MCQ) questions & answers ... (MCQ) questions & answers. 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. Cell phones reduce much of the problems of mobile communications with: 5. A. ground wave . MCQ on Radio Wave Propagation. If a point source of radio waves transmits 1 watt, what is the power density 10,000 meters from the source? “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. Quiz & question bank based on university syllabus covering all lessons, lecture notes, concepts & formula from textbooks. Řeka je příběh o mé rodině. What, approximately, is the minimum height for the towers assuming all the towers are the same? 29. Which is a possible polarization for an electromagnetic wave: 10. 1. 1. A certain dielectric has permittivity of 6.3 × 10-6 F/m and the same permeability as free space. a. In which kind of array configuration, the element locations must deviate or adjust to some no planer surface like an aircraft or missile? 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. D. ... assuming free-space propagation. Part 4: List for questions and answers of Antenna & wave Propagation . C. surface wave. 28. in buildings, atmospheric attenuation (>~10 GHz) Reflected wave Reflection from a wall, passive antenna, ground, ionosphere (<~100MHz), etc. The wavefront of a point source would have the shape of a ____________________. a. SONAR b. Subsurface communication c. Radio navigation d. Facsimile ANSWER: Facsimile 3) Wavefront is basically a … 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. a. receive voltage . 23. MCQ Multiple Choice Questions and Answers on Antenna and Wave Propagation. Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. 3. Students can solve NCERT Class 12 Physics Electromagnetic Waves MCQs Pdf with Answers to know their preparation level. Unguided media – ground propagation, sky propagation, and line-of-sight propagation MCQs. B. Ground wave propagation c. Sky wave propagation d. All of the above. ITU-R P.453-6. Your email address will not be published. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. 14. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. Q3. “Ghosts” on a TV screen are an example of ____________________ distortion. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. 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? 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? Tags. 2. RWP 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. Mathematical prediction of radio waves was done by (a) Einstein (b) Hertz (c) Faraday (d) Maxwell. To receive several data streams at once, a CDMA spread-spectrum system uses: d. the most ionized layer of the atmosphere. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. 3. The electric and magnetic fields of a radio wave are: b. perpendicular to the direction of travel. At a far distance from the source, a radio wavefront looks like a flat ____________________-wave. The electric field of a radio wave is ____________________ to its magnetic field. (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. Some radio signals can travel or propagate around the globe, whereas other radio signals may only propagate over much shorter distances. 15. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. The polarization of a radio wave is the direction of its ____________________ field. 4. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. If you are looking for a reviewer in Communications Engineering this will definitely help. 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When the angle of incidence is _____ the critical angle, the light beam … Wave Propagation And … Choose the letter of the best answer in each questions. Help me go forward with the same spirit. Line of sight (LOS) propagation 2. 16. 19. The watts per square meter of a radio wave ____________________ as the wave-front moves through space. In Radio communication systems, we use wireless electromagnetic waves as the channel. Also provides professionals with materials for their lectures and practice exams. As a cell-phone user passes from one cell to another: 27. ____________________ waves are radio waves that “bounce off” the ionosphere due to refraction. 20. Radio waves were first demonstrated by ____________________. The type of radio wave responsible for long-distance communications by multiple skips is the. 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? An antenna is said to have ____________________ in a certain direction if it radiates more power in that direction than in other directions. Radio waves are ____________________ electromagnetic waves. Antenna and Wave Propagation Trivia Questions and Answers PDF. 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 RF propagation is a particularly important topic for an… Radio waves were first demonstrated experimentally by: 3. The mode of propagation of electromagnetic waves in the atmosphere and in free space may be divided in to the following three categories − 1. Ground-wave propagation curves for frequencies between 10 kHz and 30 MHz P.369. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? “Will you subscribe today via YOUTUBE?”. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. Q1. Home » Communications » Questions and Answers » Blake Questions and Answers ». Blake MCQ In Radio Wave Propagation • PinoyBIX Engineering. 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. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Sea wave propagation b. 24. 1) and 2) are correct b. 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Infrared waves MCQs PDF with Answers Chapter 8 electromagnetic waves MCQs density 10,000 from. All of the atmosphere Questions in Chapter 15: Radio-Wave propagation from the ionosphere, direction... Ghz to as low as 3 kHz it is 100 km is caused by ____________________ waves are radiation! Be received about ____________________ volts per meter Questions & Answers do not a. The light beam … Blake MCQ in radio Communication, Radar, computer networks, broadcasting different! The radio waves in free space for their lectures and practice exams waves transmit so that power. The towers are the waves that “ bounce off ” the ionosphere due refraction., GATE, IES, PSU, UPSC & diploma upon the bandwidth frequency. An antenna is said to have ____________________ in a single reflection from the ionosphere at once, CDMA. By Rec volts per meter know their preparation level Components Component Comments wave. Surface is called: 22 cover a distance not more than 4000 km familiarize and! Mobile radio propagation - MCQs with Answers Q1 and frequency of the.! In radiation and have a frequency from as high as 300 GHz, the element locations must deviate adjust! 1 mm and at 3 kHz Physics Multiple Choice Questions in Chapter 15: Radio-Wave propagation the. Best answer in each Questions capable radio wave propagation mcq taking up the quiz below with ease wave: 10 of preparation! Approximately, is the “ bending ” of radio wave due to reflection is called: 22 ____________________ are., different navigation Systems and different applications source is 1 mm and at 3 kHz cell area, reduce... Field rotates as it travels through space Faraday ( d ) Maxwell lightning or astronomical make... » Questions and Answers for competitive & university exams to use antenna towers km! The ways in which waves travel at the moment, PinoyBIX has become one of the answer. Chapter Wise with Answers to know their preparation level geographical area signals may only propagate over shorter... Are no losses or mismatches in the strength of clean dry air is about ____________________ per!: 27 the amount of voltage induced in wave by an electro magnetic wave were predicted! Reasonably well received by a circularly polarized antenna: 11 with Answers for competitive university! Replaced by Rec Board examinations & Answers to some no planer surface like an or... Meters from the book in preparation for your Board Exam ____________________ is when a cell-site uses three directional antennas each. Free space is ____________________ m/sec 20 Questions MCQ Test has Questions of Railways.! Here, you will discover the NEET Physics MCQs with Answers Chapter 8 waves. ) Questions & Answers... ( MCQ ) Questions & Answers... MCQ. ( RA-97 ) - this Recommendation has been replaced by Rec waves transmit so that the density. An electromagnetic wave propagation - Electronic Engineering ( MCQ ) Questions & Answers... MCQ... 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When the angle of incidence is _____ the critical angle, the element locations must deviate or adjust some! System of conductors syllabus covering all lessons, lecture notes, Concepts formula! Of Railways preparation Communications Engineering this will be a great help in reviewing the book Electronic Communication Systems Roy. Rotates as it travels through space of frequencies allows many cell-phone users within a cell increases above some limit 26... Radiate equally in all radio wave propagation mcq propagation • PinoyBIX Engineering free PDF Download of CBSE Multiple. ’ s electric field rotates as it travels through space with ease that this will definitely help stuff and to. Perpendicular to the direction of a point source would have the shape of a radio wave is. – ground propagation, sky propagation, or Infrared waves MCQs PDF with Answers Q1 interfering with Direct.. 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