Recent content by Keyser

and another question please: I understand Gauss's law in regards to plains (thanks to you). but how does it work when dealing with a sphere? i know how to integrate the whole thing, but I'm trying to get it in a more intuitive manner. when i calculate the flux , I'm looking at infinitesimal area...

i have principles of physics, 9th edition, by Halidy & Resnick. @greswd: if i put a bar inside, wouldn't i have 0 E at the top and bottom?

so, if i want to treat E as a vector, i must relate it to a certain point? i thought the field was a vector anyhow, so i can add it however i wanted. i'm adding a picture that might make things clear. the green arrows are E exerted by a single charge at (0,0,0). so, from symmetry, you argue that...

but doesn't the E that go in the +Y direction "cancels" the one going in the -Y direction?

so what you are saying (in regards to question no. 1) is that when i get E=0, it's because I am adding vectors for which the total sum is zero (opposite directions) while the flux does not "consider" that case, and is a "per case" thing - each face has it's own flux, even though total E is zero...

hey all, i've recently started studying electrostatics, and i have couple of question about things that i did not fully understand, and would very much appreciate if someone could set me straight. 1) how can a cube, with a single charge in the middle of it have a flux? don't the field lines...