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## Electromagnetic Waves

by: Dr. Reina Hane

14

0

1

# Electromagnetic Waves ECE 341

Dr. Reina Hane
RHIT
GPA 3.79

Staff

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COURSE
PROF.
Staff
TYPE
Class Notes
PAGES
1
WORDS
KARMA
25 ?

## Popular in Electrical Engineering & Computer Science

This 1 page Class Notes was uploaded by Dr. Reina Hane on Monday October 19, 2015. The Class Notes belongs to ECE 341 at Rose-Hulman Institute of Technology taught by Staff in Fall. Since its upload, it has received 14 views. For similar materials see /class/225091/ece-341-rose-hulman-institute-of-technology in Electrical Engineering & Computer Science at Rose-Hulman Institute of Technology.

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Date Created: 10/19/15
2 Exam 1 Review Sheet workout exam Will also have TF and conceptual questions An electromagnetic wave travels in the aX direction in a lossless 00 nonmagnetic u1 medium The wavelength is 2m and the frequency is 75MHz The electric vector with a a a y z magnitude of 5Vm points in the J direction 2 find the electric and magnetic vectors timedomain and frequencydomain Take e to be zero ii find the instantaneous and timeaveraged Poynting vectors a a a a 5 E y z Sew V H y z ew A l c J A J5 Lass A a a 6 Z V 5 J500 27r7510t7rx A a a 5 H cos 27 75106t7rx A JE 1885 I J A 52 2 E a cos 27 7510t7rx Vy X1885 I m2 E Answe rs 1 52 s Vy lt ax21885 m2 Two conductors one coated with 01 mm of zinc alloy 0107Qm the other coated with 005mm of copper c58107Qm have a 100mA RMS 4GHz current through them Both zinc and copper are nonmagnetic u1 The conductors with round crosssections each have a radius of 1mm including coating and are each 20 mm in length Find the RMS voltage dropped across them and the average power absorbed by each conductor Answers Vc 53 mV PC 053 mW V2 126 mV P2 126 mW An electric vector amplitude 20mVm f1GHz points in the aX direction and travels in the az direction in a medium with material properties 00005Qm s10 and u1 i is this material a good conductor a good dielectric or neither Why ii What is the speed of propagation The wavelength iii What would be the new wavelength if the conductivity were changed to 0OOO1Qm Why iv find the timeaveraged Poynting vector Answers igood dielectric 6ltlt803 iivp 949107ms A949cm iiisame 1303 unchanged 2 iv S aZ 002 e39zwmZ VV 2 21192 m exam 1 review sheet

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