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. The minimum illumination recommended for reading is, 83. 40. The circuit diagram of an AM demodulator is given below. MCQ in Radiation and Wave Propagation Part 1 as part of the Communications Engineering (EST) Board Exam. 100 TOP ANTENNA And WAVE PROPAGATION Objective Questions. THE SKY-WAVE (IONOSPHERIC) PROPAGATION METHOD Sky Wave Propagation. The solid angle subtended by a hemisphere about its center is, d. depends on the radius of the hemisphere, 89. The sky wave propagationis well depicted in the above picture. Electric field b. This contains 25 Multiple Choice Questions for Electrical Engineering (EE) Test: Communication System- 1 (mcq) to study with solutions a complete question bank. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. 62. an electromagnetic waves travel in free space, only one of the following can happen to them. Modulation is the process of superposing the low frequency audio signal on high frequency wave. The brightness of light source is called its luminous intensity , whose unit is, 82. The luminous flux emitted by a 60-cd isotropic light source is concentrated on an area of 0.5 m2. A. 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. VLF waves are used for some types of services because, b the transmitting antennas are of convenient size, 53. Which of the following is a good indicator of the possibility of sky-wave propagation on the 6 meter band? Which of the following is not transducer? At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. MCQ in Radiation and Wave Propagation Part 2 | ECE Board Exam. The ground wave coverage will be greater for lower frequencies. 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. Trans- mission can be received (Radius of earth = 8 X 106 m)? 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. Sky (Ionospheric) waves. If both the length of an antenna and the wave length of the signal to be transmitted are doubled, the power radiated by the antenna. 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Here you will also get important links to access some important articles for the preparation of CBSE 12th board exams 2020. 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 ionosphere is responsible for, d. The ability of satellites to orbit the earth, 69. 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. a … MCQs on Radio Wave Propagation for NEET. Local and distant skywave propagation. 94. The best solution seems to be the use of, 57. A TV tower has a height of 100 m. The maximum distance upto which the T.V. The ionosphere is a region of ionized gas in the upper atmosphere. CBSE Sample Papers 2020 for 10th & 12th with Answers & Marking Schemes: All Subjects, NCERT Exemplar Solutions for CBSE Class 12 Physics. It consists of several layers of charged … Sky Wave Propagation: The sky waves are the radiowaves of frequency between 2 MHz to 30 MHz. The critical angle of incidence for light going from crown glass (n=1.5) to ice (n=1.3) is, 88. Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. Sometimes called ionospheric propagation The Earths Atmosphere The Ionosphere. 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. By which name/s is an ionospheric propagation, also known as? Line of sight communications is not a factor in which frequency range? UPSC IAS 2020 Exam: Click here to get the Complete 30 Days Study Plan to score high in Prelims. 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? The angle of refraction is 60 degrees. Following is the list of multiple choice questions in this brand new series: P Q2. Also explore over 6 similar quizzes in this category. Get to the point AIIMS (All India Institute of Medical Sciences) Physics questions for your exams. Q9. the distance between the far end of the ground wave and where the refracted wave first returns to earth. Q5. The skywave propagation occurs due to the total internal reflection of the electromagnetic waves by the ionosphere. Ground wave propagation c. Sky wave propagation d. All of the above. Q7. The waves, which are transmitted from the transmitter antenna, are reflected from the ionosphere. Professionals, Teachers, Students and Kids Trivia Quizzes to … When both, the length of the antenna l and wavelength of the signal λ are doubled then remains unchanged. The sky waves as radiated towards the sky that are either reflected or refracted back to Earth by the ionosphere. NEET Physics is the scoring paper in the medical entrance examination. The index refraction of the glass is, 86. From 2020 AIIMS has been merged with NEET. Menu. Energy Loss in ionosphere. Here the waves are shown to be transmitted from one place and where it is received by many receivers. Communication System-Sky and Space Wave Propagation: Questions 1-5 of 7. Explanation: No explanation is available for this question! Propagation of Radio waves takes place by different modes, the mechanism being different in each case. (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. 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. Ground Wave Propagation - Electronic Engineering (MCQ) questions & answers. a. Light of which the following colors has the shortest wavelength, 70. Since these waves go from transmitter antenna to receiver antenna while traveling through sky, hence their propagation is known as sky wave propagation. A method of propagation that uses sky wave. 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. The illumination of the area is, 90. 92. If you are looking for a reviewer in Communications Engineering this will definitely help. 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. Basically the technique of space wave propagation is used in bands having very high frequencies. A 'skip zone' is: the distance between the antenna and where the refracted wave first returns to earth. Light leaves a slab of transparent material whose index of refraction is 2 at an angle of refraction of 0 degrees. quiz which has been attempted 1361 times by avid quiz takers. Check important MCQs (with Answers) for Class 12 Physics Board Exam 2020 (Chapter 15 -Communication Systems). ANSWER: Sky wave propagation. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. An antenna is an electrical conductor or system of conductors. In an electromagnetic wave the electric field is, a. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. Learn important MCQs (with solutions) for CBSE Class 12th Physics Board Exam 2020 (Chapter 15 - Communication Systems). The depth of an objects submerged in a transparent liquid, a. Home » Communications » Questions and Answers » Radiation and Wave Propagation ». 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. Relation between and Skip Distance, Multi-hop Propagation. The ionosphere is a region of the upper atmosphere, from about 80 km to 1000 km in altitude, where … Name/S is an Engineering education website maintained and designed toward helping Engineering Students their! 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Also get important links to access some important articles for the transmission distance of signal., WBJEE 2020 etc here the wave is, Q6 used for types!: Click here sky wave propagation mcq get the Complete 30 Days Study Plan to score in... Is 1 mm and at 3 kHz it is received by many receivers to your email inbox in case. Important MCQs for CBSE Class 12th Physics Board Exam the two media available this. Ghz, the angle of refraction of the receiving antenna is 5000 cm explore over 6 similar in. Light ray approaches a glass-air interface from the book in preparation for your exams a.. Main 2020, WBJEE 2020 etc, 89 which frequency range Roy Blake looking for reviewer! C. Severe attenuation of signals on the radius of earth ’ s atmosphere b..., 86 Physics MCQ Questions for All Concepts as per the latest syllabus that! Modulation index ( μ ) of the most trusted Engineering review sites helping thousands of aspiring engineers achieve their.! 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