New answers tagged conductors
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Potential due to initially uncharged induced conductor?
The problem has a "mirror" symmetry plane - the $xy$ plane. That means that you can get charge distribution and field below the plane from those above the plane by taking the mirror image ...
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Would it be possible to make a conducting cable out of water?
Tap water’s conductivity is up to around 1500 siemens per centimeter, which isn’t awful, except when you compare it to around 5.8 billion siemens per centimeter for copper. It would be far too ...
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What happens to current in a wire with a chunk taken out of it?
... $J=\sigma E$ will remain constant, and the current $I = JA$ will decrease during the defect. (This seems wrong to me; $I$ should be constant along the length of the wire)
You are right to be ...
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What happens to current in a wire with a chunk taken out of it?
Consider the system as two resistors (with lengths $dl$=1mm and $l-dl$=9.9cm) in series - the second resistors cross section is changed from $A$ to $\lambda A$ (with $0<\lambda\le1$)
\begin{align}
...
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Accumulated charge in a grounded conductor
The potential field on the surface of the sphere is a sum of internal and external contributions. The external charge generates a potential distribution on the surface of the sphere. Because the ...
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Regarding the skin effect, is the inner surface of a tube a skin?
The skin depth is an artificial construct. The EM wave propagates into the cylinder, but rapidly decreases and changes in phase angle. It doesn't stop at one or two or three skin depths. If the ...
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What does "inside" refer to when we say that the electric field inside a conductor is 0?
In electrostatic equilibrium, the electric field must be zero within the "bulk" of a conductor. This follows from the microscopic version of Ohm's Law
$$\vec{J}=\sigma\vec{E}$$
where $\vec{J}...
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What does "inside" refer to when we say that the electric field inside a conductor is 0?
The "inside" refers to the material of the conductor itself and does not include any cavities or gaps. The existence of cavities does not break the electrostatic rule of zero electric field ...
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Accepted
What does "inside" refer to when we say that the electric field inside a conductor is 0?
"Inside the conductor" refers to the actual material of the conductor, usually metal, the "meat" of the conductor. The electric field within the cavity may be non zero, but inside ...
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Clarification on electric fields and potentials inside conductors
Due to the spherical symmetry, it is convenient to use Gauss' law in integral form with spherical closed surfaces.
For $0 \lt r \lt a$ the total charge enclosed by the sphere of radius $r$ is $q$, so ...
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Clarification on electric fields and potentials inside conductors
The answer to your question can be obtained by using the Gaussian law. It states that the integral of the electric field $\mathbf{E}$ over a surface $\mathbf{A}=A\mathbf{n}$ is proprtional to the ...
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