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Induced magnetic field loophole?
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[QUOTE="TSny, post: 4503182, member: 229090"] Apparently this answer of Griffiths is incorrect, as Griffiths himself points out in a paper in the [I]American Journal of Physics[/I]: "Hidden momentum, field momentum, and electromagnetic impulse" by David Babson, Stephen P. Reynolds, Robin Bjorkquist and David J. Griffiths Am. J. Phys. [B]77[/B], 826 (2009) According to this paper, the answers to parts (a) and (c) are ##\frac{1}{2}{\varepsilon _0}EBAd\hat y##, or half the value given above. The correction of 1/2 for part (a) is due to the need to include the fringing of the electric field of the capacitor. (It's surprising that the fringing accounts for a 50% reduction in the momentum stored in the fields.) There are various subtleties to this problem that are discussed in this paper. [/QUOTE]
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Induced magnetic field loophole?
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