Suppose you have a square, say of side a, vertically flat in front of some known...

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Suppose you have a square, say of side a, vertically flat in front of some known charge, q. (I tried my best in the picture). What do you think is the flux through the square? (Notice that the E field is not constant through the surface of the square. What is the gaussian surface you can imagine that solves the problem?) Suppose you have a square, say of side a, vertically flat in front of some known charge, q. (I tried my best in the picture). What do you think is the flux through the square? (Notice that the E field is not constant through the surface of the square. What is the gaussian surface you can imagine that solves the problem?)