In all my text books current is categorized as base quantity. They define it as rate of flow of Charge. So should it not be Charge, that has to be categorized as base quantity instead of current. Another thing Current is defined in Scalars although in all literature we are taught that net direction of flow of charges is defining current. It is not an issue whether it is conventional or electronic. But my question is why current isn't a vector and is a base quantity?