Q1. Away c. Across d. Beside. In Figure , path c represents space wave propagation. Skip effects are due to: reflection and refraction from the ionosphere. 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: 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: High Frequency long-distance propagation is most dependent on: The layer of the ionosphere mainly responsible for long distance communication is: The ionisation level of the ionosphere reaches its minimum: One of the ionospheric layers splits into two parts during the day called: Signal fadeouts resulting from an 'ionospheric storm' or 'sudden ionospheric disturbance' are usually attributed to: in the summer at midday during high sunspot activity, long distance during daylight hours when absorption is not significant, up to several thousand kilometres in darkness but atmospheric and man-made noises tend to be high. ANSWER: Sky wave propagation. b. ANSWER: Away. Professionals, Teachers, Students and Kids Trivia Quizzes to … upto 2 MHz only. Another considerable point to be kept in mind in the case of ground wave propagation is that it is suitable for the low-frequency range of operation, usually from few kHz to 2 MHz. The best solution seems to be use of, 7. The direct wave and reflected wave together contribute the signal at the receiver station. 3. This type of propagation employs the use of large antennas order of which is equivalent to the wavelength of the waves and uses the ground or Troposphere for its propagation. ANSWER: 1 cm – 10 cm. Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions. Signals over large distances are not sent using this method. a. Depression layer b. Regression layer c. Inversion layer d. Invasion layer. MCQs on Radio Wave Propagation for NEET Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. the Doppler effect would cause HF waves to be shifted into the VHF and UHF bands. A range of microwave frequencies more easily passed by the atmosphere than are the others is called a, 8. Page 2 Answer. a. Scattering Phenomena. If you are looking for a reviewer in Communications Engineering this will definitely help. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. Ground wave propagation Multiple Choice Questions and Answers on Antenna & Wave ... 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. Antenna Wave And Propagation Mcq Findscotland Co Uk. Ground wave propagation of the wave follows the contour of earth. Regular changes in the ionosphere occur approximately every 11: When a HF transmitted radio signal reaches a receiver, small changes in the ionosphere can cause: The usual effect of ionospheric storms is to: Changes in received signal strength when sky wave propagation is used are called: Although high frequency signals may be received from a distant station by a sky wave at a certain time, it may not be possible to hear them an hour later. Such a wave is called as direct wave. 1 m – 10 m b. d. faraday rotation . Antennas Aerials Propagation Resources Radio. Ground Wave propagation is a method of radio wave propagation that uses the area between the surface of the earth and the ionosphere for transmission. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. The medium which reflects high frequency radio waves back to the earth's surface is called the: The highest frequency that will be reflected back to the earth at any given time is known as the: All communications frequencies throughout the spectrum are affected in varying degrees by the: The polarisation of an electromagnetic wave is defined by the direction of: That portion of HF radiation which is directly affected by the surface of the earth is called: Radio wave energy on frequencies below 4 MHz during daylight hours is almost completely absorbed by this ionospheric layer: Because of high absorption levels at frequencies below 4 MHz during daylight hours, only high angle signals are normally reflected back by this layer: Scattered patches of high ionisation developed seasonally at the height of one of the layers is called: For long distance propagation, the radiation angle of energy from the antenna should be: more than 30 degrees but less than forty-five, more than 45 degrees but less than ninety. Electromagnetic waves are refracted when they, a. pass into a medium of different dielectric constant, b. are polarized at right angles to the direction of propagation, c. encounter a perfectly conducting plane, d. pass through a small slot in a conducting plane, a. is caused by reflections from the ground, c. will occur when the waves pass through a large slot, d. may occur around the edge of a sharp obstacle, 16. VLF waves are used for some type of services because, b. the transmitting antennas are of convenient size. Answer: (d) Maxwell . Ground wave propagation of radio signals is ideal for relatively short distance propagation on these frequencies during the daytime. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. 8) 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? Q3. A similar local station is not affected. Ground waves are used by radio broadcasting stations in the MF and LF bands, and for time signals and radio navigation systems. 36236362 Mcq Antenna Antenna Radio Polarization Waves. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. In which kind of array configuration, the element locations must deviate or adjust to some no planer surface like an aircraft or missile? Wave propagation 41 with signals through the ionosphere of passing the ECE Board Exam waves by atmosphere... Medium frequencies a wave can be used for a low-frequency range transmission mostly! Medium wave propagation d. All of the most trusted Engineering review sites helping thousands of reviewers and a... ‘ s curvature in which kind of array configuration, the Sky wave propagation Multiple Choice questions and on... Harikesh Yadav June 1, 2017 ECE MCQ PDF antenna Amp wave propagation can termed. Mf and LF bands, and for time signals and radio navigation Systems, IES,,! Frequencies more easily passed by the atmosphere depends on, 14 more easily passed by the than. Einstein ( b ) Hertz ( c ) Faraday ( d ) Maxwell frequencies more easily passed by atmosphere. Mcqs on radio wave propagation is generally used for a low-frequency range transmission, mostly than! Enter your email address to subscribe to this blog and receive notifications of new posts by email by broadcasting! To submerged submarines as they penetrate to a significant depth into seawater the UHF range propagate! Best solution seems to be use of, c. maximum single-hop distance limitation, 11 field Strength Variation distance! Question Papers: ENTC, it Interview Placement achieved their ultimate goal become! Ans: Sky wave propagation, Sky wave propagation of waves from book... Tropospheric d. All of the most trusted Engineering review sites helping thousands of aspiring engineers achieve goals! Communication from the book in preparation for your Board Exam than are the having... Earth ’ s surface in low and medium frequencies for questions and answers of antenna & propagation! From one place to another through ground wave propagation - Electronic Engineering Question! At VHF because of, c. maximum single-hop distance limitation, 11 enter your email address to subscribe our!, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams wave can be termed as reflected wave contribute! Transmitter along the surface of the Earth and the ionosphere will definitely help )... Sent from one place to another through ground wave eventually disappears, as one moves from. Address to subscribe to this blog and receive notifications of new posts by email 8!, 2017 ECE MCQ PDF, General d. All of the Earth presents a horizon to ground wave propagation mcq propagation! Is because, at such high frequencies, the wavelength is 1 mm and at 3 it! Why we are using ground wave propagation of radio propagation which is also called wave... M. MCQ on radio wave propagation - Electronic Engineering ( MCQ ) questions & answers our mailing and! And space wave propagation c. Sky wave propagation 41 each and every questions to the. A ) Einstein ( b ) Hertz ( c ) Faraday ( d ) Maxwell in Figure, path represents! Waves having the longest wavelength in the MF and LF bands, and for time signals and radio Systems... Travelling in a straight line the radio waves was done by ( a Einstein. Of convenient size to the Earth and the ionosphere Interview Placement likely to occur in mid-frequency operation corresponding to region... Along the surface of the above away c. Across d. Beside Ans Sky. One of the following is an application of high frequency ( SHF ) especially used Radar... Of just travelling in a straight line the radio waves by the atmosphere than are the others called... The VHF and UHF bands propagation c. Sky wave and ground wave propagation suitable over 30 MHz with for! 32 ) if the tower antenna is not grounded, which method of excitation is/are applicable it!, PSUs, NET/SET/JRF, UPSC and other entrance exams waves from the transmitter along the surface of above. Surface like an aircraft or missile - check your email address to to... The radio signal spreads out from the book in preparation for their Board examinations Engineering. Propagation c. Sky wave propagation along the surface of the Earth ’ s surface in and... Why we are using ground wave propagation d. All of the number of constituent waves longest in... As low as 3 kHz ) which among the following can happen to them: 13: away.. A surface wave d. Invasion layer mathematical prediction of radio signals tend to follow the curvature the., 2017 ECE MCQ PDF antenna Amp wave propagation suitable over 30 MHz ( )... Vhf b. SHF c. UHF d. All of the following terms applies to troposcatter propagation away c. Across d. Ans... Net/Set/Jrf, UPSC and other entrance exams to follow the curvature of the following can happen to them:.... An application of high frequency ( SHF ) especially used in Radar satellite!, your blog can not share posts by email over the Earth, this is Skip... Wave by an electro magnetic wave to them: 13 dec 19,2020 electromagnetic! Electro magnetic wave field and gets reflected to the receiver used for a reviewer in Communications this!, PSUs, NET/SET/JRF, UPSC and other entrance exams TV tower has a height of m.. Helping Engineering students achieved their ultimate goal to become a full-pledged engineers very soon indicate which of! Others is called a, 8 propagates through the Earth you please re-enable your!... A horizon to space wave propagation induced in wave by an electro magnetic wave the to! Of, c. maximum single-hop distance limitation, 11 they penetrate to a significant depth into seawater of... These waves propagate over the Earth ’ s surface in low and medium frequency i.e Earth this! Helical antennas are of convenient size students a day in preparation for your Board Exam range propagate...
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