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![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Aug 2007 17:49:15 IST
Accepted Answer [?]
![[Up]](/templates/default/images/icon_up.gif "[Up]")
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What is a ring?
it is just a circle with "0 Thickness"
so it does not have any surface ...so there is no point in considering its SURFACE charge density!
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this reply: 2 points
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in 1 votes ) [?]
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