A small current element I d, with d = 2 mm k and I = 2 A,

A small current element I dℓ, with dℓ = 2 mm k and I = 2 A, is centered at the origin. Find the magnetic field dB at the following points:

(a) On the x axis at x = 3 m,

(b) On the x axis at x = –6 m,

(c) On the z axis at z = 3 m, and

(d) On the y axis at y = 3 m.