Hi everyone, I have just finished reading the chapter in my book where it discusses the electric field, electric flux, Coulomb's law, Gauss's law, etc. I think my biggest problem is knowing which to equations to use and how to relate them to models that aren't int the examples. Like the book gives an example on the electric field due to an infinite line charge which will seems simple enough using the equation that I'm provided. But when the professor will give me a question about an infinitely long cylinder which wasn't one of the examples then it just throws me off. Or the book give me an example of finding the electric field due to a charged spherical shell. Then the professor will give me a question on the electric field due to a point charge and a charged spherical shell. I know there is a method to knowing which equations to use and how to go about the problem, but I'm just having so much trouble grasping the concept.