
EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 30, Problem 4R
To determine
Are the conductors permitted to run with GFCI-protected conductors in the same conduit in underwater luminaires?
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EXERCISE 1: Consider the waveguide of Example
Calculate the phase
constant, phase velocity and wave impedance for TE10 and TM11 modes at the
operating frequency of 15 GHz.
=
192.4 . For
Answer: For TE10, B = 615.6 rad/m, u = 1.531 × 108 m/s, TE
529.4 rad/m, u = 1.78 x 10 m/s, TM = 158.8 Q.
TM11, B
Example 1: A rectangular waveguide with dimensions a = 2.5 cm, b = 1 cm is to
operate below 15.1 GHz. How many TE and TM modes can the waveguide
transmit? if the guide is filled with a medium characterized by
σ = 0, &=4&o Hr = 1°
Calculate the cutoff frequencies of the modes.
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X= x+jB
α= 0 B=w/ME
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=377 √
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E=Eml Gos(wt-Bz) az
micro wave.
Chapter 30 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
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