What is electrical charge? is it a measure of the abundance of electrons within a system? Current is defined as the amount of charge flowing between any two points in a system over a given period of time, correct? but what is elctrical charge if possible to define it better/further. I am also confused as to how many types of charge there exist, our professer said neutral electric charge is also one type apart from positive and negative! is this correct? I know that we dont know why there exists only negative and positive cahrges, and its hard to define what charge is but perhaps someone can explain in a better way, and is "neutral electric charge" a thing? thanks for your time!