All Questions
11
questions with no upvoted or accepted answers
1
vote
0
answers
42
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Abstract approach to the total electric force on a charged rod
Suppose we have a 1-dimensional system (x-axis) consisting of rod of finite length $l$ and arbitrary charge density of $\lambda(x)$ at rest extending from the origin to $x=l$. And now, suppose we have ...
- 165
1
vote
0
answers
2k
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Electric potential on a uniformly charged tube
A hollow cylinder, with no top or bottom, of radius $R$ and length $L$ is uniformly charged with density $\sigma>0$. I have to find the point on space where a point charge $q>0$ has to be drawn ...
- 31
0
votes
0
answers
31
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Need help identifying missing boundary condition in charge transport problem
The system I am considering consists of a conducting liquid sandwiched between two electrodes.
The electrodes supply a constant flux of electrons $J_{ext}$.
In the liquid there are also uncharged ...
- 33
0
votes
1
answer
161
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Electron Plasma Frequency
Displayed is the context
My question is, why doesn't the electric field from the electrons permeate throughout the cold plasma?
Surely there will be flux on the RHS of the boundary as there is an ...
- 268
0
votes
2
answers
228
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Electric potential infinite box
I have a question about separation of variables to calculate the electric potential.
In the picture below the potential is only on the top of the box, which is infinite in the $z$-direction. What are ...
- 85
0
votes
0
answers
341
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Electric field on the surface of dielectric sphere and outside sphere
Let a dielectric sphere of radius $r_0$ and permittivity $\epsilon_1$ is placed in medium of permittivity $\epsilon_2$. The electric field inside sphere is $\mathbf{E_1(\mathbf{r})} = E_0 \hat{z}$. ...
- 1,335
0
votes
1
answer
28
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What distance do I use when examining the effect of an electric field on a point outside of a nonconducting sphere with an arbitrary volume charge?
It's easy enough for me to do this for a ring (as I interpret the field lines as "exiting from the centre of the ring") or a point (simply the distance from the point to the other point), but I just ...
- 19
0
votes
1
answer
49
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Decreasing energy but at expanse of what
question : A hollow spherical shell with radius R has charge Q uniformly distributed
over it.
(i) show that the energy
stored in this system is $\dfrac{Q^2}{8\pi \epsilon_{0}R}.$
(ii) Now imagine ...
user182868
0
votes
0
answers
311
views
Charge distribution on uncharged conducting sphere
I am trying to solve the following problem:
A charge $q$ is brought to a distance $d$ from the center of an uncharged, conducting sphere of radius R. What is the charge per unit area of the sphere ...
- 653
0
votes
0
answers
131
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Elementary electromagnetism problem - Electric field generated by points that form an equilateral triangle
I am a newbie at physics and i just started learning electromagnetism at the university. Some help would be very welcome on the following questions (my question and/or result and/or partial work will ...
- 101
-1
votes
1
answer
69
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Work required to bring particle towards grounded plane
I have a quick question:
If you suspend a charge $q$ above a grounded conducting plane a distance $z$ above the plane, you get that the charge induces a negative surface charge on the conductor. The ...
- 1,023