A very, large, thin conducting plate lies in the x-y plane. The plate carries a current in the y direction. The current is uniformly distributed over the plate with σ amperes flowing across each meter of length perpendicular to the current. Use Ampere's Law to find the magnetic field at some distance from the plate. (Hint: The magnetic field lines are parallel to the plate.) 2. Relevant equations Ampere's Law: ∫B|| ds = μ0*I 3. The attempt at a solution: I'm completely lost on where to even start this question. I guess that you may have to use a Gausian cylinder or rectangular prism.