A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x = - 2.0 cm. A second, parallel wire carrying a 3.5 A current intersects the x-axis at x = + 2.0cm .
A) At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
B) At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?