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## Homework Statement

Can someone please explain what use gaussian surfaces have, in really simple terms?

I don't really understnd the point of wrapping an imaginary surface around a charge, when we can just do the calcs without the imaginary surface.

Also if there are preset gaussian surfaces that are commonly used (sphere, cube, cylinder) how do we know which surface to use? and also wouldn't perfect shapes (gaussian) be intrincially and largely inaccurate, and if so, then again what is the point of superimposing an imaginary surface over the real thing?