Recent content by Fips

@noir1993 Well there's a lot of things I still don't understand and don't even know if they're related, like if the varational method is used for a perturbated state, on which occasion we consider an event a perturbation to the system... Currently I'm using Resnick's and Wolfgang's books. Do you...

Hi I was hoping someone could advise me on a textbook/platform where I can learn more about the perturbation theory applied to helium and the perturbation theory time depedant. Thanks

Homework Statement Considering a neutral particle with spin +½ and a dipolar momentum μ placed on an uniform magnetic field. Find the variation of the expected value of the 3 cartesian components of the angular momentum spin operator for the following situations: a) the angular momentum of...

Homework Statement There's a disc with a current density surface σ, with radius R and angular velocity ω Find the B Homework Equations α = vσ=ωrσ The Attempt at a Solution I'm having problems understanding why the cross product gives αr

Today in my electronics class, we were introduced to the amp op concept. After going through some fundamentals, the teacher challanged us to find v0 of a simple circuit with a battery and two resistances of 1M ohm each(v0 is in between these resistances). Afterwards he asked us if this same...

utterly helpful

So I was solving a problem and I had to find the solution for ∫dx/sen(x) and I found this, but because the forum is in french I wasn't able to understand the solution :P (especially the last two steps) Thanks!

waaa thanks that last response was very enlightening ^^ thank you!

So what you're telling me is that when the two spheres are connected there is a flow of charge (which would be described as a function) that tends to zero as the system reaches a potential equilibrium?

Homework Statement [/B] Two conducting spheres are far apart. The smaller sphere carries a total charge Q. The larger sphere has a radius that is twice that of the smaller and is neutral. After the two spheres are connected by a conducting wire, the charges on the smaller and larger spheres...

Ahhh I get it now :P tricky setence tho, thanks!

I was doing some T/F exercises and there was this one that had me confused: The potential of a negatively charged conductor must be negative Because it's conductor, i figured all of the conductor would be negatively charged and so it would have a negative potential, but apparently this...

So I'm currently studying for my electromagnetics exam that will happen on the beginning of this semestre. While studying i stumbled upon this forum looking up for some answers. I was quite happy to find this forum because I've been looking for a forum like this for a while now. I'm from...