Calculating Electric Flux Through a Square Surface

TheWarHawk
Messages
3
Reaction score
0

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



\ointE\cdotdA

The Attempt at a Solution



Well, since E\cdotdA 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)\ointdA

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

Any suggestions?
 
Physics news on Phys.org
You've converted mm to m incorrectly.
 
Sorry, that's a typo on my part, it's supposed to be 3.4 mm
 
Is your calculator in degree mode? Your method is correct.
 
Yeah, it is. Must be webassign, I hate it. Thanks very much for your help.
 

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Thread 'Help to convert units of a simple formula'

The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
View full post »

Similar threads

Electric field of a neutral conductor just at the surface
Replies
4
Views
1K
Electric Flux Through the Surface of a Circle
Replies
6
Views
8K
Electric flux through ends of an imaginary cylinder
Replies
7
Views
2K
Flux through a cylindrical surface enclosing part of a sphere
Replies
9
Views
555
I Calculation of electric flux on trapezoidal surface
Replies
11
Views
2K
Find angular momentum of EM field in terms of q and ##\Phi##
Replies
5
Views
2K
Electric flux through a surface placed between
Replies
6
Views
2K
Calculating Radiation Pattern for a grid of two rows of dipole antennas
Replies
5
Views
2K
Electric field of a spherical conductor with a dipole in the center
Replies
4
Views
4K
Is Electric Flux Through a Half Sphere Zero According to Gauss' Law?
Replies
20
Views
4K

Hot Threads

Recent Insights

Back
Top