I've been stuck on what I would of thought was a simple/common question but I can't seem to find an answer anywhere. I'm confused as to how a DC current propagates along a conductor (wire) in terms of it's E/H field. I understand that it is these fields that cause the propagation of current. However for a DC current these fields are constant and in a direction other than the direction of propagation. How could they induce a current down a straight conductor. I found an answer that said the propagation in a DC sense is due to the H field, more so than the E field. This field however will be circular around an electron. How does this field propagate along a conductor other than being induced by the charge moving and then being restricted to the Fermi velocity.