1. The problem statement, all variables and given/known data An ionized plasma flows with a velocity v in the z direction, though a rectangular pipe with x, y, z dimensions of w, h, l respectively. The walls at [itex] x=\pm w/2 [/itex] are insulating while the walls at [itex]y=\pm h/2[/itex] are conducting. Lastly there is a magnetic field B in the x direction. Find the potential between the conducting walls. 2. Relevant equations Maxwell's equations 3. The attempt at a solution I'm not used to problems with plasmas, but I take it the velocity somewhat similar to current here. I'm not sure what I need to find the potential though, perhaps the electric field between the plates, but then I'm not sure where to find that. I think my main problem is I'm just not sure where to start. Any help would be appreciated.