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Physics
Classical Physics
Electromagnetism
Can Current Density Static Create an Effective Electromagnetic Shield?
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[QUOTE="cuallito, post: 6809351, member: 190360"] I've been thinking about electromagnetic shielding lately. Of course, you have your good, old-fashioned Faraday cage. But after staring at Maxwell's equations awhile, I'm thinking: We're after a static E field, right? So if we set ## \frac{\partial \textbf{E}}{\partial t}=0## in Ampere's Law, we get $$\nabla\times \textbf{B}=\mu_0 \textbf{J}$$ Implying that if we can hold the current density ##\textbf{J}## static around a region of space, say with a constant current source, we'd effectively 'fix' the field in that region of space, thus blocking out any incident EM radiation (theoretically)? For example, if we had a cylinder wrapped around in conducting wire, hooked up to a constant current source, would the field in the interior of the cylinder stay static regardless of what the field outside it was doing? [/QUOTE]
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Physics
Classical Physics
Electromagnetism
Can Current Density Static Create an Effective Electromagnetic Shield?
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