1. The problem statement, all variables and given/known data I have a coordinate system, (x,y,z). There is a uniform-magnetic-field of 2.0 T that exists along the direction of the y-axis. There is a rectangular plane bounded by the points (3,0,0),(0,1,0),(0,1,1),(3,0,1). Calculate how much flux is traveling through the rectangular plane. 2. Relevant equations Flux = B (dot) A (dot) d 3. The attempt at a solution Since the rectangular plane is not changing, the magnetic-field is just dotted with the surface. And this surface is composed of the dot product of the Area and the Direction. I can easily find the area, but I don't know how to find the direction. What do I do with the information that tells me the B-field exists along the y-axis?