Introduction to Electrodynamics
4th Edition
ISBN: 9781108420419
Author: David J. Griffiths
Publisher: Cambridge University Press
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Chapter 9.4, Problem 9.21P
(a)
To determine
The energy density of the
(b)
To determine
To show: The intensity is
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Chapter 9 Solutions
Introduction to Electrodynamics
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Namely, the electric current I passing (A) K X (B) (C) +o V V Ampere loop FIGURE 2 (a) By symmetry, the value of magnetic field B due to the current K above or below the plate is the same, and B is obviously parallel to the plate. In which direction is B pointing above the plate? Below the plate? (b) Find the value of the magnetic field B above or below the plate by Ampere's law, using the rectan- gular Ampere loop shown in the Fig. 2(B). Again, by symmetry, the values of B must be the same above or below the plate, and it must be a constant that only depends on |K| and v. Hint: Compute S B · dl´along the four segments of the Ampere loop and pay attention if…arrow_forwardA (1.34x10^0)-m radius cylindrical region contains a uniform electric field along the cylinder axis. It is increasing uniformly with time. What is the rate of change (magnitude) of the electric field required to obtain a total displacement current of (3.548x10^0) nA through a cross section of the region? 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