The test is in 2 hours, I've attempted it and feel the answer is right, but am not going to show all that work during this crunch time, be a sport, I think the problem is setting up the vectors correctly and doing the cross product correctly,
Homework Statement
4. A long straight wire lies along the z-axis and carries an 8 A current in the +z direction. Find the magnetic field (magnitude and direction) produced at x=0.4 m, y=0, z=0.3 m by a 0.7 mm segment of wire centered at the origin.
Homework Equations
dB=(mu/4pi)(I[dL x...