# EM- Flux through a cylindrical syrfacehelp asap, pls

1. Nov 9, 2008

### lazyluke

1. The problem statement, all variables and given/known data
1. The expression F = [x,y,z] defines a vector field. Given the parametric representation of a surface S:[u cos v, u sin v, u^2] = r (u,v), where the parameters cover the ranges 0 ≤ u ≤ 2 and 0 ≤ v ≤ 2π, calculate the flux F through the surface S.

2. Relevant equations
How do i start this problem?

3. The attempt at a solution
I know the transformation equations for the cylindrical coordinates, and:
flux=Int(E dot dA=Int(divergence of E d tao
Im not sure if i should find the jackobian, but if so how do i work with the parametric representation vector r??

Last edited: Nov 9, 2008
2. Nov 10, 2008

### lazyluke

Am i even in the right department with those questions?