Flux through a cube at an angle

  • Thread starter Thread starter nilesthebrave
  • Start date Start date
  • Tags Tags
    Angle Cube Flux
AI Thread Summary
A uniform electric field of 600 N/C is directed at an angle of 30 degrees from the +y axis and 60 degrees from the +z axis, passing through a cube with 2.0 cm sides. The electric flux for each face of the cube is calculated using the formula Φ = EAcosθ. Initially, there was confusion about how to apply the formula due to the angled field, but the problem was ultimately resolved. The user realized that the setup was not as complex as initially thought. The discussion highlights the importance of understanding electric flux in non-perpendicular scenarios.
nilesthebrave
Messages
27
Reaction score
0

Homework Statement


A uniform electric field with a magnitude of 600 N/C is shown pointing in the y-z plane, at 30 degrees from the +y axis and at 60 degrees from the +z axis. This electric field passes through a cube, with each side of length 2.0cm and oriented with faces in the +x, +y, and +z directions. For each face of the cube, calculate the electric flux, and then add these results to find the net electric flux.

Homework Equations



\Phi =EAcos \theta

The Attempt at a Solution



I started off doing the left face:
(600)(.02)^2cos60=0.12

What I'm not sure on, and I guess what I'm more questioning is, since the field is at this angle do I need to set the equation up differently? My instructor has never shown us any problem like this, nor is there one in my book. Everything is always parallel or perpendicular in the examples, so do I do anything different here?
 
Last edited:
Physics news on Phys.org
forgot to upload diagram
 

Attachments

  • cubeflux.png
    cubeflux.png
    2.7 KB · Views: 583
Disregard this, I was making it more difficult than it was. Problem solved.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top