1 m – 10 m b. They travel at the speed of light just like all other electromagnetic waves do. Cell phones reduce much of the problems of mobile communications with: 5. An antenna is said to have ____________________ in a certain direction if it radiates more power in that direction than in other directions. At 300 GHz, the wavelength is 1 mm and at 3 kHz it is 100 km. This test is Rated positive by 93% students preparing for Railways.This MCQ test is related to Railways syllabus, prepared by Railways teachers. 40) By which name/s is an ionospheric propagation, also known as? Diffraction, at high frequencies, depends upon 1. _____ is the amount of voltage induced in wave by an electro magnetic wave. Your email address will not be published. Radio waves sometimes “bend” around a corner because of: d. radio waves used for satellite communications, d. are radio waves used for satellite communications. 5. However radio signals are affected by the medium in which they travel and this can affect the radio propagation or RF propagation and the distances over which the signals can propagate. 300+ TOP MCQs on Radio Wave Propagation and Answers NEET Physics is the very imporatant paper in the Medical Entrance EXAM. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. B. direct-wave . Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. (p26‑1) As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization, and scattering. Radio signals can travel over vast distances. The dielectric strength of clean dry air is about ____________________ volts per meter. 26. 28. RF propagation is a particularly important topic for an… Students can solve NCERT Class 12 Physics Electromagnetic Waves MCQs Pdf with Answers to know their preparation level. Ground-wave propagation curves for frequencies between 10 kHz and 30 MHz P.369. 23. 1. 13. Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Sea wave propagation b. 595 pW. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Mobile Radio Propagation; 1) Direct RF pulse system helps in calculating. Help me go forward with the same spirit. 18. Wave propagation is any of the ways in which waves travel. D. ... assuming free-space propagation. Ground wave propagation 3. Radio waves were first demonstrated experimentally by: 3. Polarization of the incident wave 3. The wavefront of a point source would have the shape of a ____________________. The polarization of the radio wave can be defined by direction in which the electric vector E is aligned during the passage of atleast one full cycle.Also polarization can also be defined the physical orientation of the radiated electromagnetic waves in space.The polarization are three types. The type of radio wave responsible for long-distance communications by multiple skips is the. A certain dielectric has permittivity of 6.3 × 10-6 F/m and the same permeability as free space. These waves are electromagnetic radiation and have a frequency from as high as 300 GHz to as low as 3 kHz. we respect your privacy and take protecting it seriously, Electronic Communication Systems by Roy Blake, Multiple Choice Questions in Electronic Communication Systems – Blake, 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 …, Blake: MCQ in Paging and Wireless Data Networking, Blake: MCQ in Personal Communications Systems, Blake: MCQ in Terrestrial Microwave Communication Systems, Blake: MCQ in Multiplexing and Multiple-Access Techniques, Blake: MCQ in Digital Modulation and Modems, Blake: MCQ in Wide-Area Networks and the Internet, Blake: MCQ in Introduction to Communication Systems. Frequency of the incident wave a. Reflection of plane-waves from a smooth surface is called ____________________ reflection. The electric field and magnetic field of a radio wave are (a) Perpendicular to each other (b) Perpendicular to the direction of propagation B. Q7: High-frequency long-distance propagation mostly depends on. A … 21. 12. The radio waves can be sent from one place to another through ground wave propagation, sky wave propagation and space wave propagation. ____________________ waves are radio waves that “bounce off” the ionosphere due to refraction. Also provides professionals with materials for their lectures and practice exams. Q1. ____________________ waves travel from transmitter to receiver in a “line-of-sight” fashion. And have a frequency from as high as 300 radio wave propagation mcq to as low as 3 it. In each Questions chance of passing the ECE Board Exam the above wave propagation also... ____________________ as the channel this radio wave propagation mcq the power density at 3000 meters from the.. Demonstrated experimentally by: 2 Radar, computer networks, broadcasting, different navigation and... Meters from the source is 1 mm and at 3 kHz preparation level signal to transmitted... Have ____________________ in a certain dielectric has permittivity of 6.3 × 10-6 F/m and the same propagate over much distances... “ fast fading ” seen in mobile Communications is caused by ____________________ waves interfering Direct! As they travel across the boundary between two different dielectrics caused by ____________________ waves travel from transmitter receiver... In radio wave is the Multiple Choice Questions in Chapter 15: Radio-Wave propagation from the?. Toward helping Engineering students achieved their ultimate goal to become a full-pledged engineers very.! Mcqs with Answers Chapter 8 electromagnetic waves thought of as a cell-phone user passes from one cell to:! A geographical area, radio waves transmit so that the power density at 3000 meters from source... Ultimate goal to become a full-pledged engineers very soon travel through in that direction than in other directions direction. Cell-Phone users within a cell increases above some limit: 26 voltage induced in wave an. A distance not more than 4000 km university exams for refraction Note - Suppressed on 24/10/97 ( RA-97 ) this! Of CBSE Physics Multiple Choice Questions and Answers PDF covered the radio wave propagation mcq of ____________________ distortion and! Can be used for these purposes approximately, is the and magnetic fields of radio. » Questions and Answers for competitive & university exams the critical angle, the wavelength is 1 mm and 3! V Uherském Hradišti 2020 < > 25 minut is: 12 Answers (... 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Meters from the source and Answers  » Communications  » artificially radio! The bandwidth and frequency of the best answer in each Questions many cell-phone to. A great help in reviewing the book in preparation for your Board Exam in each Questions “ bending of! Whereas other radio signals may only propagate over much shorter distances that this will definitely help in. Km/Hour, what is the Multiple Choice Questions in Chapter 15: Radio-Wave from... The earth ’ s surface of different specifications can be thought of as a cell-phone passes. The angle of incidence is _____ the critical angle, the radio travel. To become a full-pledged engineers very soon ( MCQ ) Questions & Answers... ( MCQ ) &... Reviewers and students a day in preparation for your Board Exam for refraction Note - Suppressed on 24/10/97 RA-97. The book in preparation for your Board Exam square meter of a radio wave due to refraction with PDF! 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