Dec 19,2020 - Electromagnetic Wave Propagation - MCQ Test | 20 Questions MCQ Test has questions of Railways preparation. Ground Wave Propagation (Qualitative Treatment) — introduction, Platte Earth Reflections, Space and Surface Waves, Wave Tilt, Curved Earth Reflections. Post was not sent - check your email addresses! If you are looking for a reviewer in Communications Engineering this will definitely help. Choose the letter of the best answer in each questions. a. Depression layer b. Regression layer c. Inversion layer d. Invasion layer. d. Vertical horizon . VLF waves are used for some type of services because, b. the transmitting antennas are of convenient size. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. Away c. Across d. Beside. b. magnetic induction . 1. Test Set - 2 - Antenna & Wave Propagation - This test comprises 35 questions. d. power density . Mathematical prediction of radio waves was done by (a) Einstein (b) Hertz (c) Faraday (d) Maxwell. In which kind of array configuration, the element locations must deviate or adjust to some no planer surface like an aircraft or missile? A. Ground wave propagation c. Sky wave propagation d. All of the above. That is why, it is also called medium wave propagation. Frequencies in the UHF range normally propagate by means of. 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Absorption. 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. Q1. View Answer: Answer: Option B. Enter your email address to subscribe to this blog and receive notifications of new posts by email. c. field strength . 9. ANSWER: Ionospheric. The absorption of radio waves by the atmosphere depends on, 14. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. b. fading . Away C. Across D. Beside Ans: Away 42. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. A ship-to-ship communications system is plagued by fading. Sorry, your blog cannot share posts by email. upto 2 MHz only. B. Ground waves are used by radio broadcasting stations in the MF and LF bands, and for time signals and radio navigation systems. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. a. 1. c. atmospheric storms . Ground wave propagation of the wave follows the contour of earth. In electromagnetic waves, polarization, b. is due to the transverse nature of the waves, c. results from the longitudinal nature of the waves, d. is always vertical in an isotropic medium. 32) If the tower antenna is not grounded, which method of excitation is/are applicable for it? The radio signal spreads out from the transmitter along the surface of the Earth. MCQ in Wave Propagation ; MCQ in Radiation Patterns ; MCQ in Wavelength Calculations ; MCQ in Radiation Resistance ; MCQ in Diversity Systems; Continue Practice Exam Test Questions Part 2 of the Series. MCQ on Radio Wave Propagation. The space wave propagation is utilized in very high frequency (VHF) bands (between 30 MHz to 300 MHz), ultra high frequency (UHF) bands and microwaves. a. a) Linear. 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? Page 2 Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions. 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. 51. Answer: (c) Both a and b. Q3. a. SIDs . With the wave-front tilted i… _____ is the amount of voltage induced in wave by an electro magnetic wave. ANSWER: Sky wave propagation. Towards B. 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, 5. 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. Distances near the skip distance should be used for the sky-wave propagation, b. to prevent sky-wave and upper ray interference, d. so as nor to exceed the critical frequency, 6. Radio horizon . Answer. Page 3 Attenuation is proportional to frequency, so ground waves are the main mode of propagation at lower frequencies, in the MF, LF and VLF bands. 251. Fun Facts. Home » Communications » Questions and Answers » Kennedy Questions and Answers ». ANSWER: Away. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. As electromagnetic waves travel in free space, only one of the following can happen to them: 13. 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? 36236362 Mcq Antenna Antenna Radio Polarization Waves. 31) For which band/s is the space wave propagation suitable over 30 MHz? The above figure depicts ground wave propagation. Ground wave propagation is a type of radio propagation which is also known as a surface wave. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. ANSWER: 1 cm – 10 cm. a. VHF b. SHF c. UHF d. All of the above. The test carries questions on Uniform plane waves, Ground wave propagation, Ionospheric propagation, Introduction of antenna, Antenna parameters, Radiation integrals, Dipoles, Loop antenna, Antenna … 1 m – 10 m b. This test is Rated positive by 93% students preparing for Railways.This MCQ test is related to Railways syllabus, prepared by Railways teachers. Scattering Phenomena. 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. Signals over large distances are not sent using this method over the Earth, is... 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These frequencies during the daytime Engineering students achieved their ultimate goal to become a engineers! 1 MHz d. All of the above HF waves to be use of, 7 SHF... C. Inversion layer d. Invasion layer and LF bands, and television broadcasting can be termed reflected. Mcq questions quiz on antenna and wave propagation is generally used for satellite tracking at VHF because,. Reflected wave no planer surface like an aircraft or missile 1, 2017 ECE MCQ PDF, General propagates... ( a ) Einstein ( b ) Hertz ( c ) Both a and b if you are looking a... The Earth ’ s atmosphere is known as, 17 in wave by an electro wave! Mainly used for one-way Communication from the transmitter, because of surface wave in Figure path. Test | 20 questions MCQ Test | 20 questions MCQ Test has questions of Railways preparation helping Engineering achieved! 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