A Semi-Infinite Wire Runs Along the Positive Y Axis, Beginning

Multiple Choice

A semi-infinite wire runs along the positive y axis, beginning at the origin (x = y = 0) and extending infinitely far in the +y direction.If the current in the wire is 12 A, what magnetic field does it create on the x axis at the point x = 3.5 cm?

A) 0 T
B) 3.4 x 10^-5 T
C) 6.9 x 10^-5 T
D) 1.4 x 10^-4 T
E) 4.3 x 10^-4 T