A flat square sheet of thin aluminum foil, 25 cm on a side, carries a uniformly distributed -36 nC charge. What is the approximate electric field at the following positions?(adsbygoogle = window.adsbygoogle || []).push({});

a.)0.01m above surface?

b.) 20m above the sheet?

For a.), I used E=chargedensity/(2)epsilon. From my understanding, this can only be used for points far from the edges and close to a surface.

So for b.), this formula does not apply. I cannot find anything in my notes or the text that describes this situation.

Any suggestions?

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# Homework Help: Application of Gauss's Law

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