Electric Field outside a Coaxial Cable

calcuseless

1. The problem statement, all variables and given/known data
Consider an 8mm diameter coaxial cable, which consists of a central conducting wire, and an outer cylindrical conducting braid. If a charge of +30mC is placed on the inner conductor, and a charge of -30mC is placed on the outer conducting braid, what will the electric field, in N/C, be 4cm from the center of the cable?


2. Relevant equations
Gauss' Law


3. The attempt at a solution
I'm thinking it would be 0 but I don't know how to go about showing this.

WhoWee

Please show how you reached this conclusion.

calcuseless

welp