The surface shown is a square and has a side length of 14.0 cm. The electric field acting on this area has a magnitude of 180. N/C at an angle of 27.5°. Calculate the electric flux through the shown surface.

Answer 1

angle measured how? to surface, or the Normal?

Assuming to the normal
flux=E*Area*cosTheta

Answer 2

its to the surface

Answer 3

then use sin Theta