final_ECE471_S05 - E&CE471: Electromagnetic Waves Final...

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1 E&CE471: Electromagnetic Waves Final Examination (Spring 2005) Aug 11, 2005, Instructor: A. H. Majedi Duration: 2.5 hours Calculators are permitted. Answer all questions & problems. Full mark constitutes 100 . Extra 2 marks is bonus. ------------------------------------------------------------------------------------------------------------ Name: Student ID#: 1- Find the polarization and the direction of rotation (handedness) of the following time-varying electric fields in (mV/m) [15 marks]: a) ) 120 cos( 6 ˆ ) cos( 2 ˆ ) , ( ! ! ! " ! # kz t y kz t x t z $ ! b) jky e z j x y ! " ! # ˆ ˆ 3 ) ( ~ ! c) ) sin( 5 ˆ ) sin( ˆ ) , ( kz t y kz t x t z ! " ! # ! 2- A 1 MHz uniform plane wave with amplitude 1 (V/m) is traveling through a block of copper. If the conductivity of copper is 7 10 8 . 5 (S/m) and 1 # # r r ( ) , a) Calculate the complex propagation constant [4 marks]. b)
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This note was uploaded on 04/10/2010 for the course ECE 471 taught by Professor Majedi during the Winter '10 term at University of West Alabama-Livingston.

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final_ECE471_S05 - E&CE471: Electromagnetic Waves Final...

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