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- Homework Statement:
- We are supposed to determine which (if any) of the distributions will need to/could use Gauss's law to determine the electric field

- Relevant Equations:
- flux = Q/electric constant = EA

These are the 4 distributions shown, and I have to determine which two distributions (or none at all) can use Gauss's law to determine the electric field.

So electric flux = EA = Q/electric constant.

Since all of them have charges, I could do something like Q/(A*electric constant) to get the electric field—that's where I'm confused, because I think I could actually use Gauss's law on all four of them. The only other way I can think of is that Gauss's law is applied to surfaces so that probably excludes lines (A) and disks (D), which do not really have surface area.

Am I right in thinking so? Is there a better / correct way to get to the answer?

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