Flux is always defined based on: (1) A surface and (2) A vector field (e.g. the electric field). Flux can be thought of as a measure of the number of field lines from the vector field that cross the g...Flux is always defined based on: (1) A surface and (2) A vector field (e.g. the electric field). Flux can be thought of as a measure of the number of field lines from the vector field that cross the given surface.
