Finding the Voltage Rating of a Battery in Fig. 3

[letalea]

Homework Statement

The field generated in Fig. 3 is due to a battery connected between the center conductor and the sheath. What is the voltage rating of the battery? (i.e. what is the electric potential of the positive terminal with respect to the negative terminal of the battery?)

I have attached a file that includes a diagram and relevant information needed to solve this question.

Homework Equations

V=W/Q
W=F*d

The Attempt at a Solution

I have no idea where to even start on this question. Help Please!

 

[gneill]

Start by listing your known data.