Gauss's Law Example # 5

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You explain so well!!! Now I understand everything! Thanks!

franciscohamlin
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Question: What is the surface area of a cylinder ?  Why you are using A= 2 pi r L ?
shouldn't it be A= 2 pi r L + 2 pi r L     ?

AliElDousCS
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Sweet, and then at the final equation we can just substitute for Q with sigma*length and the Length will cancel !

Kyaiel