A flat 1.0m^2 surface is vertical at x=2.0m and parallel to the yz-plane. What is the flux through the surface if it is located in a uniform electric field given by E= 26.0i + 42.0j + 62.0k N/C?

Question

A flat 1.0m^2 surface is vertical at x=2.0m and parallel to the yz-plane. What is the flux through the surface if it is located in a uniform electric field given by E= 26.0i + 42.0j + 62.0k N/C? 
Explanation if possible :)

bobpursley · Answer

what is area*E dot (1i)? remember the directional vector of area is pependicular to the plane

Pappy · Answer

So you have to do a dot product? why would it be (1i)?