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For questions that utilize the concept of electric fields (commonly denoted by the letter E), or for questions whose answers likely involve electric fields. More specific than the [electricity] tag, as questions about the phenomenon & theory of electricity do not necessarily involve the discussion of fields.

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Near field of cylindrical waves

I was wondering what the near-field expression of the Electric field for a cylindrical wave is. I know that in the case of a spherical wave, as shown in Jackson (9.18), the far field has a 1/r dependa …
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