1. The problem statement, all variables and given/known data A 2.0 cm length of wire centered on the origin caries a 20 A current directed in the positive y direction. Determine the magnetic field at the point x = 5.0 m on the x-axis. 2. Relevant equations B = uI/2piR 3. The attempt at a solution Using the equation above I just plugged in 5m for R and 20A for I and I got 8e-7 T. I was looked up current in a straight wire and found a calculator in hyperphysics that gave me 8e-7 as well, but the answer that was given to me is 1.6nT in the negative z direction.