Electrodynamics, Potentials, spherical uncharged shells

Dealingwithphysics
Messages
2
Reaction score
0

Homework Statement


using Laplace principle find potential inside an uncharged spherical shell of finite width. shell is placed in an electric field E in z-axis direction.

Homework Equations


eq0001M.gif
in this equation u is potential. equation is called 2-D Laplace’s equation.

The Attempt at a Solution


diagram which i picture in my mind is like as under.

[/B]
 

Attachments

  • eq0001M.gif
    eq0001M.gif
    360 bytes · Views: 848
Physics news on Phys.org
Dealingwithphysics said:

Homework Statement


using Laplace principle find potential inside an uncharged spherical shell of finite width. shell is placed in an electric field E in z-axis direction.

Homework Equations


View attachment 217586 in this equation u is potential. equation is called 2-D Laplace’s equation.

The Attempt at a Solution


diagram which i picture in my mind is like as under.

[/B]
please don't delete i don't have further info related to problem. its it.
 
Dealingwithphysics said:
3. The Attempt at a Solution
diagram which i picture in my mind is like as under.

Dealingwithphysics said:
please don't delete i don't have further info related to problem. its it.
Your image did not Upload correctly. As you know, we cannot provide tutorial help until you show us your best efforts to work the problem. Please try again to Upload a JPEG or PDF image of your work, or just type your work into the forum window using the math symbols under the sigma ∑ symbol, or use LaTeX (see the tutorial under INFO at the top of the page, Help/How-To). Thank you.
 
First is preferably to use spherically coordinates for our two-dimensional
Laplacian. Then you can separate the
variables and actually obtain two different (simple) differential equations.
Upon obeying the Dirichlet boundary conditions you obtain a particular solution depending on an integer.
Then you sum over all values of those
integer numbers in order to obtain a general solution.
so
 
Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
Back
Top