Finding electrostatic potential from charge distribution

Plaetean
Messages
35
Reaction score
0
Note that posting images or image links does not count as filling out the homework template.

Homework Statement


Question

Homework Equations


Equation

The Attempt at a Solution


Attempt I am not sure how to write the |r-r'| in a way that allows me to actually solve the integral. I have tried writing |r-r'| in spherical co ords, but all I seem to be able to get is this as the separation distance, which seems impossible to integrate. Any help on whether I have gone about the problem the wrong way, or a way to write |r-r'| in a more manageable form would be very much appreciated
 
Physics news on Phys.org
Are you required to first find the potential using the formula you gave? Or, are you allowed to find E using some other equation (or law)?
 
No, perhaps I could do it just using Gauss' law instead, might be easier
 
Plaetean said:
No, perhaps I could do it just using Gauss' law instead, might be easier

Yes, give it a try.
 
Thread 'Need help understanding this figure on energy levels'
This figure is from "Introduction to Quantum Mechanics" by Griffiths (3rd edition). It is available to download. It is from page 142. I am hoping the usual people on this site will give me a hand understanding what is going on in the figure. After the equation (4.50) it says "It is customary to introduce the principal quantum number, ##n##, which simply orders the allowed energies, starting with 1 for the ground state. (see the figure)" I still don't understand the figure :( Here is...
Thread 'Understanding how to "tack on" the time wiggle factor'
The last problem I posted on QM made it into advanced homework help, that is why I am putting it here. I am sorry for any hassle imposed on the moderators by myself. Part (a) is quite easy. We get $$\sigma_1 = 2\lambda, \mathbf{v}_1 = \begin{pmatrix} 0 \\ 0 \\ 1 \end{pmatrix} \sigma_2 = \lambda, \mathbf{v}_2 = \begin{pmatrix} 1/\sqrt{2} \\ 1/\sqrt{2} \\ 0 \end{pmatrix} \sigma_3 = -\lambda, \mathbf{v}_3 = \begin{pmatrix} 1/\sqrt{2} \\ -1/\sqrt{2} \\ 0 \end{pmatrix} $$ There are two ways...
Back
Top