How Do You Compute the Flux of a Vector Field Through a Circle?

[Shaad]

Homework Statement

Let C be the circle of radius 2 centered on the origin and contained in the plane 2x - 3y + 5 = 0. Compute the flux through C of the constant vector field v = {6, - 1, 12}

I have no idea about this problem. This is one the review problem which was given to us in the class for next week's exam.

 

[gabbagabbahey]

Well, what is the definition (it involves an area integral) of flux of a vector field through a surface?

What is the surface in this case? What is the unit normal to that surface?