Is Electric current a scalar or vector?
Answer 1. Quite generally, electric current is a vector, although in some problems we can work with it as if it was a scalar. It describes a flow of charge per unit time at a point in space (for example, in a circuit). This flow of charge has a direction in space, hence current is a vector. In a wire, which limits the current flow to one dimension, the vector character of current is (can be) taken care of just by using positive current for one direction and negative current for the opposite one. However, this plus/minus distinction makes current a “one-dimensional vector”. The vector character becomes completely clear and significant when one starts thinking about magnetic field produced by flowing current. Please read the discussion here for more: https://carnot.physics.buffalo.edu/archives/2006/02_2006/msg00462.html 2. It is not clear to me, what “the sense of flow” means here. I assume the questioner asks about the *flux* quantities, which are often defined as scalars. In the colleg
