Fundamentals of Electromagnetics with Engineering Applications
1st Edition
ISBN: 9780470105757
Author: Stuart M. Wentworth
Publisher: Wiley, John & Sons, Incorporated
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Chapter 4, Problem 4.28P
Plot the loss tangent of seawater (
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8. A nonmagnetic medium has an intrinsic impedance 240e³/6. Find its complex permittivity.
In a lossless medium
Select one or more:
a. The amplitude of the wave depends on the location
O b. The wave does not subside as it moves forward
c. Conductivity of the medium o = 0
Od. The permittivity and permeability of the medium are complex
A rectangular copper block is depth d along z, width w along y, and length / along x.
In response to a wave incident upon the block from above, a current is induced in the block in
the positive x-direction. Determine the ratio of the ac resistance of the block to its dc resistance
at frequency f.
0: 5.8.107.-
S
m
/:=1.2 m d: 40 cm
W: 50 cm
f:=2 kHz
Chapter 4 Solutions
Fundamentals of Electromagnetics with Engineering Applications
Ch. 4 - How long does it take for charge density to drop...Ch. 4 - At a particular point in a slab of silver, a...Ch. 4 - A current density is given by J=e.01taA/m2. Find...Ch. 4 - At t=0s, 60.0C is evenly distributed throughout a...Ch. 4 - A propagating electric field is given by...Ch. 4 - A 10.0-MHz magnetic field travels in a fluid for...Ch. 4 - Modify the simple wave program in MATLAB 4.1 to...Ch. 4 - Modify the traveling wave program in MATLAB 4.2 to...Ch. 4 - Prob. 4.9PCh. 4 - A bar magnet is dropped through a conductive ring....
Ch. 4 - Considering Figure 4.7, suppose the area of a...Ch. 4 - Sometimes a transformer is used as an impedance...Ch. 4 - Prob. 4.13PCh. 4 - The mean length around a nickel core of a...Ch. 4 - A triangular wire loop has its vertices at the...Ch. 4 - Referring to Figure 4.23, suppose a conductive bar...Ch. 4 - Suppose we have a conductive bar moving along a...Ch. 4 - The radius r of a perfectly conducting metal loop...Ch. 4 - Rederive Vemf for the rectangular loop of Figure...Ch. 4 - In Figure 4.16, replace the rectangular loop with...Ch. 4 - Prob. 4.21PCh. 4 - Prob. 4.22PCh. 4 - A Faraday disk generator is similar to the...Ch. 4 - Prob. 4.24PCh. 4 - Prob. 4.25PCh. 4 - Suppose a vector field is given by A=2cosaz Verify...Ch. 4 - A pair of 60cm2 area plates are separated by a...Ch. 4 - Plot the loss tangent of seawater ( =4S/m and r=81...Ch. 4 - A 1.0-m-long coaxial cable of inner conductor...Ch. 4 - Suppose in free space that E(z,t)=5.0e2ztaxV/m. Is...Ch. 4 - An electric field propagating in a lossless...Ch. 4 - A magnetic field propagating in free space is...Ch. 4 - Find the instantaneous expression for E for the...Ch. 4 - Given, at some point distant from a source at the...Ch. 4 - In a lossless, nonmagnetic media, the magnetic...Ch. 4 - Suppose, in a nonmagnetic medium of relative...Ch. 4 - Prob. 4.37PCh. 4 - Prob. 4.38PCh. 4 - Prob. 4.39PCh. 4 - Find E(z,t) in Problem 4.32 using phasors.Ch. 4 - Prob. 4.41PCh. 4 - Find H(y,t) in Problem 4.36 using phasors.Ch. 4 - In MATLAB 4.4, a polar plot of the phasor...
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- The figure below is a cross-sectional view of a coaxial cable. The center conductor is surrounded by a rubber layer, an outer conductor, and another rubber layer. In a particular application, the current in the inner conductor is I, = 1.16 A out of the page and the current in the outer conductor is I, = 2.90 A into the page. Assuming the distanced = 1.00 mm, answer the following. d (a) Determine the magnitude and direction of the magnetic field at point a. 2.32e-4 magnitude If you construct an imaginary circle of radius d passing through point a, how much current passes through this circle? UT direction ---Select--- (b) Determine the magnitude and direction of the magnetic field at point b. 1.16e-4 magnitude You can approach this problem by finding the field produced by current I, and the field produced by I, and then adding them vectorially. µT direction ---Select---arrow_forwardQ5 a) A fiber has the following characteristics: n1 = 1.45 (core index) and A=2%. Find the N.A and the acceptance angle.arrow_forwardA piece of RG-59B/U Coaxial cable has a nominal capacitance of 0.8 F/m, and 8.5 H inductance per meter. Assume the diameter of the inner conductor as 0.8m, and the dielectric constant of the insulation as 2.9. Find the diameter of the outer conductor in cm?arrow_forward
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