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# 329sp08he2 - ECE 329 Introduction to Electromagnetic Fields...

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ECE 329 Introduction to Electromagnetic Fields Spring 08 University of Illinois Goddard, Peck, Waldrop, Kudeki Exam 2 Thursday, March 13, 2008 — 7:00-8:15 PM Name: Section: 9 AM 12 Noon 1 PM 2 PM Please clearly PRINT your name in CAPITAL LETTERS and circle your section in the above boxes. This is a closed book exam and calculators are not allowed. You are allowed one formula sheet of 8.5 by 11 inch dimensions — both sides of the sheet may be used. Please show all your work and make sure to include your reasoning for each answer. All answers should include units wherever appropriate. Problem 1 (25 points) Problem 2 (25 points) Problem 3 (25 points) Problem 4 (25 points) TOTAL (100 points) 1

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1. Consider plane electromagnetic wave propagation in free space . Magnetic field intensity of the wave is given as H = ˆ y 2 cos(3 π · 10 8 t - β z ) A m . a) (4 pts) Given that the wave is known to propagate in + z direction what is the numerical value of β (stated with proper units)?
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329sp08he2 - ECE 329 Introduction to Electromagnetic Fields...

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