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417midterm2_2073

417midterm2_2073 - PHY 417 Midterm Exam 2 NAME Friday Exam...

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PHY 417 Midterm Exam - 2 NAME:————————————– Friday, May 25, 2007 Exam duration: 55 minutes Grading: —-Q1———–Q2———–Q3————-Q4————Q5——–Total– —————–/25———/25———-/25———-/25———/25——– Directions: Please solve the first question and any three of the remaining four questions. If you attempt all the questions, please indicate which ones you want graded clearly. You are allowed to use a 1-page, front and back, formula sheet. 1
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1 Plane Electromagnetic Waves An electromagnetic wave is specified (in SI units) by the following function: E = ( - 6 i + 3 5 j )(10 4 V/m ) e i [ 1 3 ( 5 x +2 y ) π × 10 7 - 9 . 42 × 10 15 t ] (1) Find: (a) [4 pts] the direction along which the electric field oscillates, (b) [4 pts] the scalar value of amplitude of the electric field, (c) [5 pts] the direction of propagation of the wave, (d) [4 pts]the propagation number and wavelength, (e) [4 pts] the frequency and angular frequency, (f) [4 pts] the speed.
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