Determine the polarizability of a wire segment.

[Pepjag]

Homework Statement

The center of the spherical metal ball of
radius R, carrying a negative charge -Q, is
located a distance r from the center of a short,
thin, neutral copper wire of length L. The
induced charges at the two ends of the wire is
±q. Determine the polarizability of the wire
segment which has a length L = 0.0105 m.

Homework Equations

E = k*2qL/r^3
F = qE
E(dipole) = k*2*alpha*E(sphere)/r^3

The Attempt at a Solution

I am given so many variables that I could not find a way to get any values from these equations.

 

[Pepjag]

Bump, this question is driving me crazy, I would love some input.