# What exactly is current?

by PhantomPower
Tags: current
 P: 14 The idea of current has been presented to me so many different ways I thought id try and find out a little more into what exactly is current. Most places refer to a flow of charge as a current, seems good to me, but - I heard the current may flow outside the wire in... I want to say charge desnty fields but don't quote me on that... Is this is case? if so how? Secondly the concept of "current flowing" seems to me very strage - if current = $\frac{\delta q}{\delta t}$ surely this implies the "current flow" people speak of is : $\frac{\delta^2 q}{\delta^2 t}$ ? Thank you for your help.