I know that in an electrostatic situation electric field inside a conductor is always zero and according to gauss law there cannot be a net charge inside a conductor all charge must reside outside.
What about the situation outside i.e. on the surface of conductor where there is charge is there an electric field outside as well i.e. is charge experiencing a net electromagnetic force why doesn't charge leave the conductor surface what causes it to stay on the surface is it because conductor is rigid is it due to force of nucleus or due to the force outside of medium ie air ?
E.g. consider a neutral conductor insulated from all sides and a glass rod with positive charge is brought closer to it why dont electrons move towards it completely?