21-7 A Long, Coaxial Cable, Shown in Cross-Section in the Drawing

21-7
A long, coaxial cable, shown in cross-section in the drawing, is made using two conductors that share a common central axis, labeled C.The conductors are separated by an electrically insulating material that is also used as the outer cover of the cable.The current in the inner conductor is 2.0 A directed into the page and that in the outer conductor is 2.5 A directed out of the page.The distance from point C to point A is 0.0015 m; and the distance from C to B is 0.0030 m.The radii a and b of the conductors are 6.0 × 10^-4 m and 1.9 × 10^-3 m, respectively.
-A long straight wire carries a 40.0 A current in the +x direction.At a particular instant, an electron moving at 1.0 × 10⁷ m/s in the +y direction is 0.10 m from the wire.The charge on the electron is -1.6 × 10^-19 C.What is the force on the electron at this instant?

A) 1.3 × 10^-16 N in the +x direction
B) 1.3 × 10^-16 N in the -x direction
C) 6.5 × 10^-10 N in the +y direction
D) 6.5 × 10^-10 N in the -y direction
E) 6.5 × 10^-16 N in the -y direction