Maxwell's Equations and Electromagnetic Waves: Key Concepts and Definitions, Quizzes of Aerospace Engineering

Download Maxwell's Equations and Electromagnetic Waves: Key Concepts and Definitions and more Quizzes Aerospace Engineering in PDF only on Docsity! TERM 1 Which of the following are Maxwell's Equations? DEFINITION 1 B. Faraday's Law C. Ampere-Maxwell Law D. Gauss's Law for Magnetism TERM 2 The direction of energy propagation of an electro-magnetic wave is always parallel to the direction of its electric field. DEFINITION 2 FALSE TERM 3 The speed of an electro-magnetic wave in free space is 3x10^8 m/s. DEFINITION 3 True TERM 4 Defraction results in a decrease of the radar line of sight. DEFINITION 4 False TERM 5 The intensity of a magnetic field generated by the current flowing in an infinite wire is directly proportional to the current and inversly proportional to the distance-squared from the center of the wire. DEFINITION 5 False TERM 6 The dipole current on both sides of the feedline of a balanced half-wave dipole flows in the same direction with a maximum at the center (feed line) and zero current at the ends. DEFINITION 6 True TERM 7 The half power points which determine the HPBW for an antenna field pattern lobe in linear scale occur at values of 0.707. DEFINITION 7 True TERM 8 Which of the following antenna regions are we most interested in? DEFINITION 8 Fraunhofer TERM 9 Antenna directivity is the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions. DEFINITION 9 True TERM 10 The ratio of an antenna's maximum effective area to its maximum directivity is the same for all antennas. DEFINITION 10 True