Area of trapezoid formed by slicing a cylinder

[stedwards]

In my opinion it is not. It's a trapezoid because a flux would cross all the length of the cylinder.

Now your talking about the projection of a cylinder into a plane, I believe. The projection would have two parallel sides corresponding to the sides of the cylinder with elliptical end caps. (Whether a projection or a slice at some non-zero angle, you don't get a trapezoid.)

Does the flux pass through the entire cylinder?

 

[magnetpedro]

Now your talking about the projection of a cylinder into a plane, I believe. The projection would have two parallel sides corresponding to the sides of the cylinder with elliptical end caps. (Whether a projection or a slice at some non-zero angle, you don't get a trapezoid.)

Does the flux pass through the entire cylinder?

Yes, it does!

 

[stedwards]

Then, I guess you are asking about a projection, which is a long rectangle with the short ends replaced by half an ellipse. If you have a small light source across the room, it's the shadow cast by a soup can near the wall.