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2922
bio website akhmeteli.org
location Houston, TX
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visits member for 3 years, 4 months
seen 3 hours ago

9h
answered The proof of a discrete Fourier identity in quantum field theory
1d
answered What does it mean when we say that power of a bulb is 10 W? Since $V/I=$ resistance is a constant, how can power $=VI$ be a constant?
1d
comment How can electric field accelerate fog dissipation?
@Weather Report: Looks like you should look up "electrostatic precipitation"
1d
revised How can electric field accelerate fog dissipation?
Addition
1d
answered How can electric field accelerate fog dissipation?
2d
answered generating heat using IR radiation
2d
comment Charge present at the centroid of equilateral triangle
@Mixcels: You chose one direction in which motion is stable, but for the equilibrium to be stable, motion must be stable in any direction. According to the Earnshaw theorem, there is a direction in which motion is not stable in your case, for example, out-of-plane motion.
May
21
comment Charge present at the centroid of equilateral triangle
@Mixcels: I don' t know how to explain it. Looks like you don't quite know what stable/unstable equilibrium is. Maybe you should look here first: en.wikipedia.org/wiki/Mechanical_equilibrium
May
16
comment Surface charge density for an off-centre charge in a spherical shell?
@Joseph: I believe you are mixing up the charge density in the body of the conductor (the spherical shell) and the charge density inside the volume surrounded by the conductor, which volume is mentioned in my quote from Wikipedia. We do know the charge density inside the volume - there is just one charge off center there. I think when you say "the charges are free to move around inside the conductor" you mean the charges within the body of the conductor, as charges cannot move inside the volume surrounded by the conductor.
May
16
comment Surface charge density for an off-centre charge in a spherical shell?
@Joseph: How is this different from other cases where the image charge method is used?
May
16
awarded  Generalist
May
10
comment Surface charge density for an off-centre charge in a spherical shell?
@Sebastian Riese: Please see my second comment.
May
10
comment Surface charge density for an off-centre charge in a spherical shell?
@Joseph: Maybe you should first solve the problem for the interior of the shell, then for the exterior of the shell, but I believe in both cases you can use the image charge method with inversion.
May
10
comment Surface charge density for an off-centre charge in a spherical shell?
@Joseph: "Alternatively, application of this corollary to the differential form of Gauss' Law shows that in a volume V surrounded by conductors and containing a specified charge density ρ, the electric field is uniquely determined if the total charge on each conductor is given." -same source as in my answer.
May
10
answered Surface charge density for an off-centre charge in a spherical shell?
May
10
comment Why does “liquid metal” do this?
Look up ferrofluids.
May
10
answered Why does the Schwinger limit fail to predict the electron radius?
May
8
comment Why do we (3 dimensional creatures) see in 2 spatial dimensions?
We have stereoscopic vision with our two eyes.
May
6
answered Algebraic solution of Dirac equation for Coulomb potential
May
6
answered How electric field can be less than force per unit test charge?