The correct relation between carrier frequency (f) and RC for best quality demodulation is: For best quality demodulation,1/f << RC or RC >> 1/f. A transmitting antenna at the top of a tower has a height 3200 cm and that of the receiving antenna is 5000 cm. the angle of refraction is, 84. quiz which has been attempted 1361 times by avid quiz takers. September 6, 2020 by Kishen Leave a Comment. 3. A TV tower has a height of 100 m. 99. gets in contact with the ionosphere and reflected by it. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject … Q3. a. lengthen the skip distance . A Skywave Propagation: The electromagnetic waves emitted by transmitting antenna are received after being reflected from the ionosphere are called sky waves and this type of propagation is called Sky wave Propagation. A TV tower has a height of 100 m. The maximum distance upto which the T.V. When the light ray approaches a glass-air interface from the glass side at the critical angle, the angle of refraction is, 80. Total internal reflection can occur when light passes from one medium to another, 79. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References. 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 increase the transmission distance of UHF signal, which of the following should be done? Here you will also get important links to access some important articles for the preparation of CBSE 12th board exams 2020. Propagation of Radio waves takes place by different modes, the mechanism being different in each case. 100 TOP ANTENNA And WAVE PROPAGATION Objective Questions. signals? the distance between the far end of the ground wave and where the refracted wave first returns to earth. A. Energy Loss in ionosphere. (2) The waves returned to the earth after getting reflected by the ionosphere at a height of about 60-400 km is known as sky waves. Light of which the following colors has the shortest wavelength, 70. This is the Multiples Choice Questions Part 2 of the Series in Radiation and Wave Propagation as one of the Communications Engineering topic. Answer. The ionosphere is a region of the upper atmosphere, from about 80 km to 1000 km in altitude, where … a … 98. Sky Wave Propagation — Introduction. If you are looking for a reviewer in Communications Engineering this will definitely help. The propagation of light in straight lines, c. The bending of a beam of light when it goes from one medium to another, d. The bending of a beam of light when it strikes a mirror, 77. 63. the absorption of a radio waves by the atmosphere depends on, a. is caused by reflections from the ground, b. arises only with spherical wave fronts, c. will occur when the waves pass through a large slot, d. may occur around the edge of a sharp object, 65. So, the power radiated by antenna will remain unchanged. The angle of incidence is, 85. Which of the following mode of propagation is used to send radio-waves from one place to another? a. Maxwell’s b. Lorentz c. Helmholtz d. Poisson’s ANSWER: Helmholtz 3) If the magnetic field component of a plane wave … Explanation: No explanation is available for this question! The critical angle of incidence for light going from crown glass (n=1.5) to ice (n=1.3) is, 88. we respect your privacy and take protecting it seriously, Questions and Answers in Radiation and Wave Propagation, Series of Multiple Choice Questions in Electronics Systems and Technologies, 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 …, MCQ in Radiation and Wave Propagation Part 8 – Answers, MCQ in Radiation and Wave Propagation Part 8 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 7 – Answers, MCQ in Radiation and Wave Propagation Part 7 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 6 – Answers, MCQ in Radiation and Wave Propagation Part 6 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 5 – Answers, MCQ in Radiation and Wave Propagation Part 5 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 4 – Answers, MCQ in Radiation and Wave Propagation Part 4 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 3 – Answers, MCQ in Radiation and Wave Propagation Part 3 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 2 – Answers, MCQ in Radiation and Wave Propagation Part 2 | ECE Board Exam, MCQ in Radiation and Wave Propagation Part 1 – Answers, MCQ in Radiation and Wave Propagation Part 1 | ECE Board Exam. Dispersion is the term used to describe, a. Top Ranking CBSE Sample Paper Books for 2021 Boards. 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? The minimum illumination recommended for reading is, 83. Distances near the skip distance should be used for sky-wave propagation, b. to prevent sky-wave and upper ray interference, d. so as not to exceed the critical frequency, 56. When a beam of light enters one medium from another, a quality that never changes is its, 73. A ship-to-ship communications system is plague by fading. Answer: (C) Both a and b. Space (Tropospheric) waves 3. A microwave-transmitting antenna is 550ft high. Give it a try and share your score. These MCQs are very useful for other competitive exams like UPSEE 2020, JEE Main 2020, WBJEE 2020 etc. The circuit diagram of an AM demodulator is given below. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. Definition of Sky Wave Propagation3. Trans- mission can be received (Radius of earth = 8 X 106 m)? In the diagram of medium wave propagation, c shows the space wave propagation. CBSE Sample Papers 2020 for 10th & 12th with Answers & Marking Schemes: All Subjects, NCERT Exemplar Solutions for CBSE Class 12 Physics. Ground wave communications is most effective in what frequency range? Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. Local and distant skywave propagation. Q2. A. If you are looking for a reviewer in Communications Engineering this will definitely help. 95. Get to the point AIIMS (All India Institute of Medical Sciences) Physics questions for your exams. The skywave propagation occurs due to the total internal reflection of the electromagnetic waves by the ionosphere. Radio waves of frequency 300 MHz to 3000 MHz belongs to ultra high frequency band. The ionosphere has its greatest effect on signals in what frequency range? 97. Q3. Indicate which of the following frequencies cannot be used for reliable beyond-the-horizon terrestrial communications without repeaters, c. capable of use for long-distance communications on the moon, 55. Relation between and Skip Distance, Multi-hop Propagation. Basically the technique of space wave propagation is used in bands having very high frequencies. The angle of refraction is 60 degrees. These radio waves can propagate through atmosphere and are reflected back by the ionosphere of earth’s atmosphere. Long skip sky-wave propagation on the 10 meter band. A carrier wave is modulated by n number of sine waves with modulation indices μ1, μ2, μ3…. the distance between any two refracted waves. The sky wave propagationis well depicted in the above picture. The best solution seems to be the use of, 57. Here the waves are shown to be transmitted from one place and where it is received by many receivers. Mcqs in Wave propagation. A light ray enters one medium from another along the normal. ANSWER: Sky wave propagation. Always seems more than its actual depth, c. May seems more than its actual depth, depending on the index of refraction of the liquid, d. May seem less or more than its actual depth depending on the angle of view, 78. If the transmitter power remains constant, an increase in the frequency of the sky wave will . Q10. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Tropospheric scatter is used with frequencies in the following range, 60. When both, the length of the antenna l and wavelength of the signal λ are doubled then remains unchanged. 2. 93. Before we discuss different modes of wave propagation, let us see the allocation of frequencies for broadcasting. MCQ S Radiowave Propagation Radio Propagation Scribd. Since these waves go from transmitter antenna to receiver antenna while traveling through sky, hence their propagation is known as sky wave propagation. 1) Which among the following exhibits perpendicular nature in TEM wave? The ionosphere in the upper portion of the THE SKY-WAVE (IONOSPHERIC) PROPAGATION METHOD Sky Wave Propagation. 76. The receiving antenna is 200ft high. MCQs on Radio Wave Propagation for NEET. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Get to the point AIIMS (All India Institute of Medical Sciences) Physics questions for your exams. An underwater swimmer shines a flash light beam upward at an angle of incidence of 40 degrees. An antenna is an electrical conductor or system of conductors. 62. an electromagnetic waves travel in free space, only one of the following can happen to them. Light leaves a slab of transparent material whose index of refraction is 2 at an angle of refraction of 0 degrees. The total modulation index (μ) of the wave is, Q6. You can practice NEET questions and those also include important AIIMS questions. Ground wave propagation c. Sky wave propagation d. All of the above. 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. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. Professionals, Teachers, Students and Kids Trivia Quizzes to … The solved questions answers in this Test: Communication System- 1 quiz give you a good mix of easy questions and tough questions. a. Which of the following is a good indicator of the possibility of sky-wave propagation on the 6 meter band? The solid angle subtended by a hemisphere about its center is, d. depends on the radius of the hemisphere, 89. Check important MCQs (with Answers) for Class 12 Physics Board Exam 2020 (Chapter 15 -Communication Systems). VLF waves are used for some types of services because, b the transmitting antennas are of convenient size, 53. The electric field and magnetic field of a radio wave are (A) Perpendicular to each other (B) Perpendicular to the direction of propagation (C) Both a and b (D) None of the above. Short skip sky-wave propagation on the 10 meter band. By continuing to use our website, you agree to our. Sea wave propagation B. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Q4. Sea wave propagation b. Q5. Based on that, it can be classified as: 1. Line of sight communications is not a factor in which frequency range? Subscribe to our mailing list and get interesting stuff and updates to your email inbox. The depth of an objects submerged in a transparent liquid, a. E.g. Magnetic field c. Direction of propagation d. All of the above ANSWER: All of the above 2) Which equations are regarded as wave equations in frequency domain for lossless media? UPSC IAS 2020 Exam: Click here to get the Complete 30 Days Study Plan to score high in Prelims. signals transmission is either space wave propagation, i.e., line of sight propagation or satellite communication. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Therefore, the term transducer is applied to gramophone pickups, microphones and loudspeakers but not for amplifier. Indicate which one of the following terms applies to troposcatter propagation, 52. Q7. Also provides professionals with materials for their lectures and practice exams. Which mode of communication is/are not employed for the transmission of T.V. Always seems less than its actual depth, b. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. Communication System-Sky and Space Wave Propagation: Questions 1-5 of 7. a. Summary of Wave Characteristics in Different Frequency Ranges. B. States that power density is inversely proportional to the distance from its source. Hence, it is an example of broadcasting. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past … A 'skip zone' is: the distance between the antenna and where the refracted wave first returns to earth. The index of refraction of water is, 87. Light enters a glass plate whose index of refraction is 1.6 at an angle of incidence of 30 degrees . band, U.H.F band etc. 96. New Post! What layer aids MF surface-wave propagation a little and reflects some HF waves in daytime? MCQ in Radiation and Wave Propagation Part 1 as part of the Communications Engineering (EST) Board Exam. The index refraction of the glass is, 86. The ionosphere causes radio signals to be. MP Board Class 12 Physics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Hindi Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Economics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Biology Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Mathematics Model Question Paper: Marking Scheme, Weightage and Blueprint, MP Board Class 12 Chemistry Model Question Paper: Marking Scheme, Weightage and Blueprint. Students preparing for CBSE Class 12th Physics Board Exam 2020 usually ask about important MCQs (Multiple Choice Questions) & here we have provided important questions (with solution), based on Chapter 15 (Communication Systems) of Class 12th Physics NCERT textbook. Antenna And Wave Propagation Multiple Choice Questions And. This is the Multiple Choice Questions in Chapter 15: Radio-Wave Propagation from the book Electronic Communication Systems by Roy Blake. (2) The waves returned to the earth after getting reflected by the ionosphere at a height of about 60-400 km is known as sky waves. The angle of refraction is, d. Dependent on the indexes of refraction of the two media. 40) By which name/s is an ionospheric propagation, also known as? 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? Learn important MCQs (with solutions) for CBSE Class 12th Physics Board Exam 2020 (Chapter 15 - Communication Systems). A range of microwave frequencies more easily passed by the atmosphere than are the others is called a, 58. frequencies in the UHF range normally propagate by means of, 59. The luminous flux emitted by a 60-cd isotropic light source is concentrated on an area of 0.5 m2. This is the Multiples Choice Questions Part 2 of the Series in Radiation and Wave Propagation as one of the Communications Engineering topic. UNIT VIII Wave Propagation – II: Antenna and wave propagation pdf; Sky Wave Propagation — Introduction. Q9. a. Parallel to both magnetic field and the wave direction, b. Perpendicular to both the magnetic field and the wave direction, c. Parallel to the magnetic field and perpendicular to the wave direction, d. Perpendicular to the magnetic field and parallel to the wave direction, 68. The splitting of white light into its component colors in refraction, b. b. increase the range of the ground wave . A method of propagation that uses sky wave. Also explore over 6 similar quizzes in this category. A pinoybix mcq, quiz and reviewers. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. Home » Communications » Questions and Answers » Radiation and Wave Propagation ». Ground wave propagation C. Sky wave propagation D. All of the above Ans: Sky wave propagation 41. Towards B. The mode of communication used for T.V. Try this amazing Quiz: Trivia Questions On Electromagnetic Wave! Ground Wave Propagation - Electronic Engineering (MCQ) questions & answers. Q8. The maximum distance between them for satisfactory communication in line of sight mode is: This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations. In this video, i have explained Sky Wave Propagation by following outlines:1. D. … MCQs on Radio Wave Propagation for NEET Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. The illumination of the area is, 90. It consists of several layers of charged … 7) After which phenomenon/phenomena do the waves arrive at the receiving antenna in ionospheric propagation? The ionosphere is responsible for, d. The ability of satellites to orbit the earth, 69. Modulation is the process of superposing the low frequency audio signal on high frequency wave. The sky waves as radiated towards the sky that are either reflected or refracted back to Earth by the ionosphere. Sky wave propagation is preferred when the wave has to travel a longer distance. Sky Wave Propagation2. Transducer is a device used for converting a one form of energy into another. From 2020 AIIMS has been merged with NEET. Relative to the angle of incidence, the angle of refraction, 74. 2 MHz to 30 MHz frequencies are propagating through the sky waves. The frequencies up to 2 MHz is propagating through ground waves. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. Following is the list of multiple choice questions in this brand new series: P Electric field b. Sky (Ionospheric) waves. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. 92. Communication System-Sky and Space Wave Propagation: Questions 6-7 of 7. Sky Wave Propagation: The sky waves are the radiowaves of frequency between 2 MHz to 30 MHz. NEET Physics is the scoring paper in the medical entrance examination. 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