1. The problem statement, all variables and given/known data Not so much of homework questions but more to do with clarifying concepts: 1. How do i assess whether or not field lines emitted by charged objects (i.e uniformly charged cube) are both perpendicular to their surfaces uniform? This is in relation to taking the E of ∮φ = EdA as a constant. 2. What is the difference between having a charged conductor and charged insulator in a Gaussian surface? Do I have to take in any particular considerations when calculating flux and fields in either case? E.g: Is calculating the flux of a uniformly charged spherical conductor and insulator the same thing? 3. What does symmetry actually entail? Is a symmetrical object one that has uniform electric fields passing through its surface? Thanks for any help! 2. Relevant equations - 3. The attempt at a (re)solution 1. I was told that I could use coulomb's law for point charges to work out whether or not fields were uniform over the surface of a uniformly charged cube, however i'm not quite sure how to apply this. Does this have to do with integration (extended charged body) and summing up the fields experienced over various points on the surface and making comparisons? 2. Again I was told that the main difference was that net charges reside on conductors (due to mobile charges) while insulators don't have mobile charges. Again i'm not sure how this would affect calculating flux and field.