Fundamentals of Electromagnetics with Engineering Applications
1st Edition
ISBN: 9780470105757
Author: Stuart M. Wentworth
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 4, Problem 4.33P
Find the instantaneous expression for E for the magnetic field of Problem 4.6.
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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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- As shown in Figure 4, when a current I flows in a straight line with infinite length, the distance ? from the current flow is ?Find the intensity H of the magnetic field from as far away as . The thickness of the line is zero and the material of space is air.arrow_forwardWhen the same current flows in the same direction in the form of two parallel straight lines separated by l, as shown in Figure 5, the twoFind the magnetic field H at the position where the distance is z0 away from the center line perpendicular to the propagation current.The thickness of the line is zero and the material of space is air.arrow_forwardThe presence of a few negative alignments of magnetic dipole moment is given by which materials? Paramagnetic Ferromagnetic Diamagnetic None of thesearrow_forward
- A cylindrical conductor of radius 1 cm has an internal magnetic field ? = ?0 (?2−?20.03) ?Φ ?/?Find the total current carried by the cylindrical conductor.arrow_forwarda) Suppose, a magnetic field, = axz+ byz + c; using Gauss’s law find out the relation between components a and b.arrow_forwardThe magnetic field intensities inside and outside of a long and smooth conductor with a cross section radius are as follows. Accordingly, find the current densities J inside and outside the conductor. (Hint: Use cylindrical coordinates)arrow_forward
- State and prove Gauss’ law for electrostatics. Show that the electric field intensity at a point close an infinite sheet of charge of surface charge density is σ is given byarrow_forwardin a space with properties of (relative conductivity) sigma = 0.00964 S/m, (magnetic relative permeability)ur = 100 and (relative permittivity)er = 1 and maximum magnetic field of 1*10^-3 A/m travels in the direction of "x" positive in 100 MHz with its field vector at "z" direction. Find the instantaneous electric field associated with that magnetic field.arrow_forwardIs Gauss’ law applicable to free space or medium or both? Explain your answer with reasonsarrow_forward
- What will be the intrinsic impedance of free space? Show detailed steps of calculation.arrow_forwardDetermine the relationship between Coulomb’s Law and Gauss Law and explain it briefly.arrow_forwardA long, solid, cylindrical wire of radius A has a current density given by j = j0r/A. Determine the magnetic field, within the wire, in terms of the total current "I" flowing through the wire.arrow_forward
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