Calculating Electric Flux Through a Square Surface

[TheWarHawk]

Homework Statement

A square surface, 34 mm each side, is immersed with an electric field of magnitude 1700 N/C. The field lines make a 35 degree angle with the normal line. Find the electric flux through the surface.

Homework Equations

$\oint$E$\cdot$dA

The Attempt at a Solution

Well, since E$\cdot$dA can be rewritten as EA*cos($\Theta$), I did that, and since E and Cos($\Theta$) are constants, I pulled them out of the integral giving me

E*Cos($\Theta$)$\oint$dA

which comes out to be E*Cos($\Theta$)*A, but when I plug in 1700*Cos(35)*.0034$^{2}$ it's wrong.

Any suggestions?

 

[vela]

You've converted mm to m incorrectly.

 

[TheWarHawk]

Sorry, that's a typo on my part, it's supposed to be 3.4 mm

 

[vela]

Is your calculator in degree mode? Your method is correct.

 

[TheWarHawk]

Yeah, it is. Must be webassign, I hate it. Thanks very much for your help.