1. The problem statement, all variables and given/known data Calculate the magnitude of the magnetic field at a point 100cm from a long, thin conductor carrying a current of 1A. 2. Relevant equations B = ui/2pi(a) 3. The attempt at a solution My question is why is this modeled after a problem with an infinite wire? When I first read it I thought there wasn't enough information as I figured we would need to know how the wire is oriented with respect to the point. Please advise.