http://www.mysolutions.tecnico.ulisboa.pt//wiki/index.php?action=history&feed=atom&title=Ion_and_electron_drifts_%28earth%27s_magnetic_field%29 2026-09-27T07:51:15Z Histórico de edições para esta página nesta wiki MediaWiki 1.35.2 http://www.mysolutions.tecnico.ulisboa.pt//wiki/index.php?title=Ion_and_electron_drifts_(earth%27s_magnetic_field)&diff=2958&oldid=prev 2017-04-04T14:50:58Z

<p></p> <table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="pt"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Revisão anterior</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revisão das 14h50min de 4 de abril de 2017</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l18" >Linha 18:</td> <td colspan="2" class="diff-lineno">Linha 18:</td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>(F. F. Chen  ~ 2.8) Suppose the earth&#039;s magnetic field is \(3\times10^{-5}\) T at the equator and falls off as \(1/r^3\) as in a perfect</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>(F. F. Chen  ~ 2.8) Suppose the earth&#039;s magnetic field is \(3\times10^{-5}\) T at the equator and falls off as \(1/r^3\) as in a perfect</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>dipole. Let there be an isotropic population of 1 eV protons and 30 keV electrons, each with density \(n=10^7<del class="diffchange diffchange-inline">$ </del>m<del class="diffchange diffchange-inline">$</del>^{-3}\)</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>dipole. Let there be an isotropic population of 1 eV protons and 30 keV electrons, each with density \(n=10^7<ins class="diffchange diffchange-inline">\) </ins>m<ins class="diffchange diffchange-inline">\(</ins>^{-3}\)</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>at \(r=5\) earth radii in the equator plane.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>at \(r=5\) earth radii in the equator plane.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr> </table>

Ist426982 http://www.mysolutions.tecnico.ulisboa.pt//wiki/index.php?title=Ion_and_electron_drifts_(earth%27s_magnetic_field)&diff=2957&oldid=prev 2017-04-04T14:50:36Z

<p>Criou a página com &quot;&lt;div class=&quot;toccolours mw-collapsible mw-collapsed&quot; style=&quot;width:420px&quot;&gt; &#039;&#039;&#039;Metadata&#039;&#039;&#039; &lt;div class=&quot;mw-collapsible-content&quot;&gt; *CONTEXTO : Segundo ciclo universitário *AREA:...&quot;</p> <p><b>Página nova</b></p><div>&lt;div class=&quot;toccolours mw-collapsible mw-collapsed&quot; style=&quot;width:420px&quot;&gt;<br /> &#039;&#039;&#039;Metadata&#039;&#039;&#039;<br /> &lt;div class=&quot;mw-collapsible-content&quot;&gt;<br /> *CONTEXTO : Segundo ciclo universitário<br /> *AREA: Física<br /> *DISCIPLINA: Física e Tecnologia dos Plasmas<br /> *ANO: 4<br /> *LINGUA: en<br /> *AUTOR: Vasco Guerra<br /> *MATERIA PRINCIPAL: Single particle motion I<br /> *DESCRICAO: <br /> *DIFICULDADE: *<br /> *TEMPO MEDIO DE RESOLUCAO: 300 [s]<br /> *TEMPO MAXIMO DE RESOLUCAO: 600 [s]<br /> *PALAVRAS CHAVE: <br /> &lt;/div&gt;<br /> &lt;/div&gt;<br /> <br /> (F. F. Chen ~ 2.8) Suppose the earth&#039;s magnetic field is \(3\times10^{-5}\) T at the equator and falls off as \(1/r^3\) as in a perfect<br /> dipole. Let there be an isotropic population of 1 eV protons and 30 keV electrons, each with density \(n=10^7$ m$^{-3}\)<br /> at \(r=5\) earth radii in the equator plane.<br /> <br /> (a) Compute the ion and electron \(\vec{\nabla} B\) drift velocities.<br /> <br /> (b) Does an electron drift eastward or westward?<br /> <br /> (c) How long does an electron take to encircle the earth?<br /> <br /> (d) Compute the current ring density in A/m\(^2\).</div>

Ist426982