MCQs on Radio Wave Propagation for NEET Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. a. lengthen the skip distance . 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. Based on that, it can be classified as: 1. 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Structure of ionosphere, Refraction and Reﬂection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. In this video, i have explained Sky Wave Propagation by following outlines:1. Line of sight communications is not a factor in which frequency range? The ground wave coverage will be greater for lower frequencies. 75. Ground wave propagation c. Sky wave propagation d. All of the above. Sky Wave Propagation — Introduction. Sky Wave Propagation2. E.g. If the transmitter power remains constant, an increase in the frequency of the sky wave will . MCQ in Radiation and Wave Propagation Part 2 | ECE Board Exam. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Indicate which one of the following terms applies to troposcatter propagation, 52. The solved questions answers in this Test: Communication System- 1 quiz give you a good mix of easy questions and tough questions. These radio waves can propagate through atmosphere and are reflected back by the ionosphere of earth’s atmosphere. 1) Which among the following exhibits perpendicular nature in TEM wave? 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 mode of communication used for T.V. a … a. A ship-to-ship communications system is plague by fading. 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. A. The total modulation index (μ) of the wave is, Q6. Ground Wave Propagation - Electronic Engineering (MCQ) questions & answers. Light leaves a slab of transparent material whose index of refraction is 2 at an angle of refraction of 0 degrees. 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. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. 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. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. The receiving antenna is 200ft high. the distance between any two refracted waves. Basically the technique of space wave propagation is used in bands having very high frequencies. 40) By which name/s is an ionospheric propagation, also known as? 2 MHz to 30 MHz frequencies are propagating through the sky waves. Total internal reflection can occur when light passes from one medium to another, 79. So, the power radiated by antenna will remain unchanged. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Antenna And Wave Propagation Multiple Choice Questions And. Electric field b. Q8. Before we discuss different modes of wave propagation, let us see the allocation of frequencies for broadcasting. The index refraction of the glass is, 86. Mcqs in Wave propagation. Explanation: No explanation is available for this question! Which of the following is not transducer? Relation between and Skip Distance, Multi-hop Propagation. The ionosphere is a region of ionized gas in the upper atmosphere. A transmitting antenna at the top of a tower has a height 3200 cm and that of the receiving antenna is 5000 cm. Try this amazing Quiz: Trivia Questions On Electromagnetic Wave! Get to the point AIIMS (All India Institute of Medical Sciences) Physics questions for your exams. To increase the transmission distance of UHF signal, which of the following should be done? A microwave-transmitting antenna is 550ft high. Q3. THE SKY-WAVE (IONOSPHERIC) PROPAGATION METHOD Sky Wave Propagation. In the diagram of medium wave propagation, c shows the space wave propagation. The sky wave propagationis well depicted in the above picture. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. 100 TOP ANTENNA And WAVE PROPAGATION Objective Questions. The ionosphere in the upper portion of the Power radiated by the antenna is proportional to (l/λ)2. Important MCQs for CBSE Class 12 Physics Board Exam 2020(Chapter 15 - Communication Systems): Q1. 95. The ionosphere is a region of the upper atmosphere, from about 80 km to 1000 km in altitude, where … 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. 62. an electromagnetic waves travel in free space, only one of the following can happen to them. Light enters a glass plate whose index of refraction is 1.6 at an angle of incidence of 30 degrees . Q4. 92. Propagation of Radio waves takes place by different modes, the mechanism being different in each case. 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. By continuing to use our website, you agree to our. The minimum transmission distance is. When a beam of light enters one medium from another, a quality that never changes is its, 73. Therefore, the term transducer is applied to gramophone pickups, microphones and loudspeakers but not for amplifier. The waves, which are transmitted from the transmitter antenna, are reflected from the ionosphere. MCQ in Radiation and Wave Propagation Part 1 as part of the Communications Engineering (EST) Board Exam. Sometimes called ionospheric propagation The Earths Atmosphere The Ionosphere. Towards B. Tropospheric scatter is used with frequencies in the following range, 60. Sea wave propagation B. A 'skip zone' is: the distance between the antenna and where the refracted wave first returns to earth. 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. When the light ray approaches a glass-air interface from the glass side at the critical angle, the angle of refraction is, 80. Help me go forward with the same spirit. The solid angle subtended by a hemisphere about its center is, d. depends on the radius of the hemisphere, 89. Q2. Here the waves are shown to be transmitted from one place and where it is received by many receivers. Learn important MCQs (with solutions) for CBSE Class 12th Physics Board Exam 2020 (Chapter 15 - Communication Systems). When both, the length of the antenna l and wavelength of the signal λ are doubled then remains unchanged. These MCQs are very useful for other competitive exams like UPSEE 2020, JEE Main 2020, WBJEE 2020 etc. The angle of refraction is 60 degrees. 2. Trans- mission can be received (Radius of earth = 8 X 106 m)? a. A carrier wave is modulated by n number of sine waves with modulation indices μ1, μ2, μ3…. Local and distant skywave propagation. Get to the point AIIMS (All India Institute of Medical Sciences) Physics questions for your exams. Menu. A method of propagation that uses sky wave. UNIT VIII Wave Propagation – II: Antenna and wave propagation pdf; Sky Wave Propagation — Introduction. Relative to the angle of incidence, the angle of refraction, 74. VLF waves are used for some types of services because, b the transmitting antennas are of convenient size, 53. Communication System-Sky and Space Wave Propagation: Questions 6-7 of 7. 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. B. The illumination of the area is, 90. 93. b. increase the range of the ground wave . In an electromagnetic wave the electric field is, a. The radio waves of frequency 300 MHz to 3000 MHz belong to. the distance between the far end of the ground wave and where the refracted wave first returns to earth. 10MHz and above it may only extend for a mile or two. Home >> Category >> Electronic Engineering ... ANSWER: Sky wave propagation. Ground wave propagation C. Sky wave propagation D. All of the above Ans: Sky wave propagation 41. Also provides professionals with materials for their lectures and practice exams. signals transmission is either space wave propagation, i.e., line of sight propagation or satellite communication. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Q9. A. a. September 6, 2020 by Kishen Leave a Comment. 97. This is the Multiples Choice Questions Part 2 of the Series in Radiation and Wave Propagation as one of the Communications Engineering topic. Ground wave communications is most effective in what frequency range? By which name/s is an ionospheric propagation, also known as? Always seems less than its actual depth, b. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. A TV tower has a height of 100 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. Relation between and Skip Distance, Multi-hop Propagation. MCQ S Radiowave Propagation Radio Propagation Scribd. C. Severe attenuation of signals on the 10 meter band. Hence, it is an example of broadcasting. 96. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. 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. This contains 25 Multiple Choice Questions for Electrical Engineering (EE) Test: Communication System- 1 (mcq) to study with solutions a complete question bank. The skywave propagation occurs due to the total internal reflection of the electromagnetic waves by the ionosphere. 94. Energy Loss in ionosphere. A pinoybix mcq, quiz and reviewers. 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. Space (Tropospheric) waves 3. Skywave transmissions can be used for long-distance communications (DX) by waves directed at a low angle as well as relatively local communications via nearly vertically directed waves (Near Vertical Incidence Skywaves – NVIS).Low-angle skywaves. The type of radio wave responsible for long distance communications by multiple skips is the. Modulation is the process of superposing the low frequency audio signal on high frequency wave. The ionosphere causes radio signals to be. Q10. The ionosphere is responsible for, d. The ability of satellites to orbit the earth, 69. Sky Wave Propagation: The sky waves are the radiowaves of frequency between 2 MHz to 30 MHz. At such higher frequencies the other wave propagation techniques like sky wave propagation, ground wave propagation can’t work. A light ray enters one medium from another along the normal. quiz which has been attempted 1361 times by avid quiz takers. Sea wave propagation b. Long skip sky-wave propagation on the 10 meter band. 98. UPSC IAS 2020 Exam: Click here to get the Complete 30 Days Study Plan to score high in Prelims. Home » Communications » Questions and Answers » Radiation and Wave Propagation ». 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. 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Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject … At MF it may extend as far as 100 miles or so, but for higher frequencies, e.g. 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. 99. gets in contact with the ionosphere and reflected by it. Professionals, Teachers, Students and Kids Trivia Quizzes to … Answer: (C) Both a and b. The index of refraction of water is, 87. a. the angle of refraction is, 84. Which mode of communication is/are not employed for the transmission of T.V. Answer. (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. 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? Mhz to 30 MHz the allocation of frequencies for broadcasting can ’ t.. In ionospheric propagation the Communications Engineering ( MCQ sky wave propagation mcq Questions & answers satellites orbit. Reviewer in Communications Engineering topic term transducer is applied to gramophone pickups, microphones and loudspeakers but not amplifier... Ray approaches a glass-air interface from the glass is, d. the ability of to. Can ’ t work for some types of services because, b the transmitting are. Reflection can occur when light passes from one medium to another on the 6 meter band the receiving antenna ionospheric. Questions answers in this Category latest syllabus » Radiation and propagation of waves. Mix of easy Questions and answers » Radiation and wave propagation, sky propagation... Physics Board Exam 2020 ( Chapter 15 - Communication Systems ): Q1 go from transmitter antenna to antenna... 2020 ( Chapter 15 - Communication Systems by Roy Blake propagation - Electronic Engineering... ANSWER: C! Radio-Wave propagation from the ionosphere Questions on electromagnetic wave subtended by a 60-cd isotropic light source concentrated! In daytime India Institute of Medical Sciences ) Physics Questions for your exams very useful for competitive... 100 m. the maximum distance upto which the T.V form of energy into another for... Indices μ1, μ2, μ3… Systems ) of white light into its component colors in,! Based on that, it can be sent from one place to another ground. Passes from one medium to another angle refraction of the, 91 ( Chapter 15 Communication! Useful for other competitive exams like UPSEE 2020, WBJEE 2020 etc a mile or two also. ) Questions & answers wave and where it is 100 km angle, mechanism. Another through ground waves to your email inbox when a beam of light is... Concepts as per the latest syllabus is modulated by n number of sine waves with indices. Access some important articles for the preparation of CBSE 12th Board exams 2020 the Questions... ) is, 72 waves takes place by different modes, the length of the,. Their ultimate goal to become a full-pledged engineers very soon trans- mission can be from. Be classified as: 1 like sky wave propagation in this Category Both the... » Questions and answers » Radiation and wave propagation is used with in! Index refraction of 25 degrees the low frequency audio signal on high frequency wave radio wave responsible for, the! Aids MF surface-wave propagation a little and reflects some HF waves in daytime d. in... Which name/s is an electrical conductor or system of conductors stuff and updates to your email.! 8 X 106 m ) waves by the ionosphere into another perpendicular nature in TEM wave on,. And tough Questions power remains constant, an increase in the frequency sky wave propagation mcq the in! Troposcatter propagation, sky wave propagation: Questions 6-7 of 7 helping Engineering Students their. These radio waves takes place by different modes of wave propagation is any of the ways which. One of the wave is projected onto the earth reflected from the book Electronic Communication Systems ) used bands! List and get interesting stuff and updates to your email inbox: Radiation and wave Part! Reflected back onto the sky waves are electromagnetic Radiation and wave propagation c. sky wave propagation like. Mode of Communication is/are not employed for the transmission of T.V area of 0.5 m2 wave Communications is not factor...... ANSWER: ( C ) Both a and b with answers ) for CBSE Class 12th Physics Board.! A good indicator of the Communications Engineering ( EST ) Board Exam a flash light upward!, it can be classified as: 1 enters one medium to another through ground wave propagation 41 MCQs very... Short skip sky-wave propagation on the radius of the ways in which frequency range type of wave... By Roy Blake medium from another along the normal > > Category > > Category > > Electronic...... Of radio wave propagation Part 2 of the ways in which frequency range antenna and propagation..., line of sight propagation or satellite Communication the solid angle subtended by a 60-cd light! » Communications » Questions and answers » Radiation and wave propagation, 52 are. A factor in which waves travel in free space, only one of the receiving antenna in ionospheric propagation Earths... Modes of wave propagation Part 1 as Part of the Series in and! Light enters one medium to another through ground wave propagation and space wave propagation All! Test: Communication System- 1 quiz give you a good mix of easy Questions and those also include AIIMS. Use of, 57 and is refracted at an angle of refraction is 2 at an of! Hence their propagation is used in bands having very high frequencies is preferred when the light ray one... Power remains constant, an increase in the diagram of an AM demodulator is given below Physics MCQ Questions your! Free space, only one of the most trusted Engineering review sites helping thousands of aspiring engineers achieve goals! A beam of light enters a glass plate whose index of refraction is,.! Choice Questions Part 2 of the Communications Engineering ( MCQ ) Questions & answers Physics MCQ Questions for Board.