I'm currently studying Gauss's Law and interaction of the charge with different Gaussian surfaces etc. But here's something that I couldn't understand. Why does a charge 'stick' to a Gaussian surface?
For example: when we put some charges over a Gaussian surface. They spread themselves evenly over the Gaussian surface? Why don't they just fall down (maybe because they have no mass?)? or not interact with the Gaussian surface at all? Why don't they just stay where they are?