Update 2022-02-17 08:44

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Jean-Sébastien
2022-02-17 08:44:22 +01:00
parent 6874e66024
commit ec8a4ca406
204 changed files with 1048 additions and 957 deletions
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@@ -1,7 +1,7 @@
<!DOCTYPE html>
<html lang="en">
<head>
<!-- 2022-02-15 Tue 10:14 -->
<!-- 2022-02-17 Thu 08:42 -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Pre-Quantum Electrodynamics</title>
@@ -1604,14 +1604,14 @@ field is independent of the path, and that it is proportional to the test charge
We can thus define a function representing the work per unit charge and
called the <b>electrostatic potential</b>
</p>
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</p>
<div class="alteqlabels" id="orgd05772f">
<div class="alteqlabels" id="org64452e8">
<ul class="org-ul">
<li>Gr (2.21)</li>
</ul>
@@ -1627,7 +1627,7 @@ called the <b>electrostatic potential</b>
\]
</p>
<aside id="org845a4b1">
<aside id="orge80f4ba">
<p>
\(\phi\) carries as unit: Newton-meters per coulomb or joules per coulomb, which is called a <b>volt</b>.
In the SI system where the ampere is a base unit, a volt is a \(kg m^2/s^3 A\).
@@ -1644,14 +1644,14 @@ want; it's energy <i>differences</i> which matter).
The potential difference between two arbitrary points \({\bf a}\) and \({\bf b}\) is
well-defined without the need to specify the reference point,
</p>
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<a id="p_diff"></a><a href="./ems_es_ep_d.html#p_diff"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-link" viewBox="0 0 16 16">
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</svg></a>
</p>
<div class="alteqlabels" id="orgdee1b1d">
<div class="alteqlabels" id="orgce58087">
<ul class="org-ul">
<li>Gr (2.21)</li>
</ul>
@@ -1659,7 +1659,7 @@ well-defined without the need to specify the reference point,
</div>
</div>
<div class="main div" id="orge61d020">
<div class="main div" id="org823abb6">
<p>
\[
\phi({\bf b}) - \phi({\bf a}) = - \int_{\bf a}^{\bf b} {\bf E} \cdot d{\bf l}
@@ -1676,14 +1676,14 @@ The reference point is typically put at infinity. The electrostatic potential c
point charge \(q\) at the origin can then be calculated (taking for convenience \(d{\bf l} = \hat{\bf r} dr\),
<i>i.e.</i> moving in purely radially) as
</p>
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<path d="M9 5.5a3 3 0 0 0-2.83 4h1.098A2 2 0 0 1 9 6.5h3a2 2 0 1 1 0 4h-1.535a4.02 4.02 0 0 1-.82 1H12a3 3 0 1 0 0-6H9z"/>
</svg></a>
</p>
<div class="alteqlabels" id="org3ec01fa">
<div class="alteqlabels" id="org88dc3c9">
<ul class="org-ul">
<li>FLS II (4.20,4.23)</li>
<li>Gr (2.26)</li>
@@ -1706,14 +1706,14 @@ point charge \(q\) at the origin can then be calculated (taking for convenience
The electrostatic potential moreover inherits the superposition principle from the electric field,
so for a distribution of point charges \(q_i\) at positions \({\bf r}_i\), we have
</p>
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</p>
<div class="alteqlabels" id="org0a5483b">
<div class="alteqlabels" id="org71c84ec">
<ul class="org-ul">
<li>FLS II (4.24)</li>
<li>Gr (2.27)</li>
@@ -1723,7 +1723,7 @@ so for a distribution of point charges \(q_i\) at positions \({\bf r}_i\), we ha
</div>
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<div class="core div" id="org30c0dc5">
<p>
</p>
@@ -1739,14 +1739,14 @@ so for a distribution of point charges \(q_i\) at positions \({\bf r}_i\), we ha
<p>
For a continuous charge density in a volume \({\cal V}\), we have
</p>
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</svg></a>
</p>
<div class="alteqlabels" id="org3c2604d">
<div class="alteqlabels" id="org126bd66">
<ul class="org-ul">
<li>Gr (2.29)</li>
<li>PM (2.18)</li>
@@ -1755,7 +1755,7 @@ For a continuous charge density in a volume \({\cal V}\), we have
</div>
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<p>
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@@ -1772,14 +1772,14 @@ For a continuous charge density in a volume \({\cal V}\), we have
<p>
whereas for a surface or line charge distribution, respectively,
</p>
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</p>
<div class="alteqlabels" id="orgf9839b6">
<div class="alteqlabels" id="org3d07738">
<ul class="org-ul">
<li>Gr (2.30)b</li>
</ul>
@@ -1787,7 +1787,7 @@ whereas for a surface or line charge distribution, respectively,
</div>
</div>
<div class="main div" id="orgae40499">
<div class="main div" id="org1b08b0e">
<p>
\[
\phi({\bf r}) = \frac{1}{4\pi \varepsilon_0} \int_{\cal S} da' \frac{\sigma({\bf r}')}{|{\bf r} - {\bf r}'|}
@@ -1797,14 +1797,14 @@ whereas for a surface or line charge distribution, respectively,
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</p>
<div class="alteqlabels" id="org7a0dd61">
<div class="alteqlabels" id="org4cd608c">
<ul class="org-ul">
<li>Gr (2.30)a</li>
</ul>
@@ -1812,7 +1812,7 @@ whereas for a surface or line charge distribution, respectively,
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@@ -1845,7 +1845,7 @@ target="_blank">Creative Commons Attribution 4.0 International License</a>.
</div>
<div id="postamble" class="status">
<p class="author">Author: Jean-Sébastien Caux</p>
<p class="date">Created: 2022-02-15 Tue 10:14</p>
<p class="date">Created: 2022-02-17 Thu 08:42</p>
<p class="validation"></p>
</div>