The drawing shows two long, thin wires that carry currents in the positive z direction. Both wires are parallel to the z axis. The 50-A wire is in the y-z plane and is 4.00 m from the z axis. The 40.0-A wire is in the x-z plane and is 5.00 m from the z axis. Find the magnitude and direction of the magnetic field at the origin for the following when only the 50.0 A current is switched on.
40 A
50 A
5 m
4 m
1.60 x 10^-6 T, +x
2.00 x 10^-6 T, -y
2.50 x 10^-6 T, -y
2.00 x 10^-6 T, +x
2.50 x 10^-6 T, +x
1.60 x 10^-6 T, -y