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      <title>Módulo 7 - Circuitos Elétricos by Francisco Vicente</title>
      <link>https://padlet.com/franciscojrmc/zzs2otqmus4r</link>
      <description>Indução Eletromagnética</description>
      <language>en-us</language>
      <pubDate>2018-04-10 08:24:08 UTC</pubDate>
      <lastBuildDate>2023-01-25 07:52:12 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>ÍNDICE</title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250159481</link>
         <description><![CDATA[<div>2. Indução eletromagnética<br>2.1 Força magnética<br>2.2 Campo Magnético<br>2.3 Fluxo do campo magnético<br>2.4 Corrente elétrica induzida<br>2.5 Corrente elétrica alternada<br>2.6 Transformadores</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-10 08:31:59 UTC</pubDate>
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      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250163813</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-04-10 08:46:37 UTC</pubDate>
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      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250165207</link>
         <description><![CDATA[<div>A i<strong>ndução electromagnética</strong> é um fenómeno que origina a produção de uma força eletromotriz num meio ou corpo exposto a um campo magnético variável. Quando o dito corpo é um condutor, produz-se uma corrente induzida. Este fenómeno foi descoberto por Michael Faraday que o expressou indicando que <strong><mark>a </mark></strong><mark>magnitude da tensão induzida é proporcional à variação do fluxo magnético</mark> (Lei de Faraday).</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-10 08:50:24 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250165207</guid>
      </item>
      <item>
         <title>Indução Eletromagnética</title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250169356</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2018-04-10 09:03:49 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/250169356</guid>
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      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882116</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/d5e4c1f87dd10f5ac6c22c6c29ee20dd/eletricidade.jpg" />
         <pubDate>2018-04-15 13:19:49 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882116</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882239</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/5b1ec5e59e9c08eead1a242f24e0bc42/Lei_da_atra__o_exerc_cios_para_manifestar_seus_desejos.jpg" />
         <pubDate>2018-04-15 13:21:20 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882239</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882892</link>
         <description><![CDATA[<div>É um objeto que provoca um campo magnético em seu redor e cuja força exerce um poder de atração ou repulsão. Um exemplo presente no nosso quotidiano, são os ímanes com pólos negativo e positivo.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 13:27:44 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251882892</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883275</link>
         <description><![CDATA[<div><strong>O que é um Íman</strong></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 13:30:43 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883275</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883492</link>
         <description><![CDATA[<div>O que é a Eletricidade</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 13:32:31 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883492</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883790</link>
         <description><![CDATA[<div>A Eletricidade é um ramo da Física responsável pelo estudo de fenómenos que ocorram por causa de cargas elétricas em repouso ou em movimento. O nome eletricidade deriva da palavra grega "Eléktron".<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 13:35:30 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251883790</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251885439</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-04-15 13:53:09 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251885439</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886129</link>
         <description><![CDATA[<div>Ímanes Naturais</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 14:00:09 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886129</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886221</link>
         <description><![CDATA[<div>Ímanes Artificiais</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 14:01:05 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886221</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886343</link>
         <description><![CDATA[<div>São aqueles que adquirem propriedade magnética ao serem atritados com um íman natural. Podem ter uma maior capacidade que os ímanes naturais.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 14:02:09 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886343</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886641</link>
         <description><![CDATA[<div>São aqueles que encontramos na natureza e são compostos por minério de ferro. Este tipo de ferro chama-se "Magnetita".</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 14:04:41 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251886641</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251887008</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-04-15 14:08:26 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251887008</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251888973</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-04-15 14:26:11 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251888973</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251889323</link>
         <description><![CDATA[<div>É possível criar a forma que a pessoa deseja, sendo mais ergonómico para a realização de um trabalho</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 14:29:10 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251889323</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251896389</link>
         <description><![CDATA[<div>Regióes ativas e zona neutra</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 15:31:43 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251896389</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251896477</link>
         <description><![CDATA[<div>Os ímanes podem dividir-se em três partes. Sendo elas: regiões ativas/polares; pólos norte e sul e zona neutra (onde não se manifesta qualquer tipo de atividade magnética)</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 15:32:36 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251896477</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251897667</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/6c8998c2bf6a66e73068e0b392d7c769/Sem_T_tulo.png" />
         <pubDate>2018-04-15 15:43:39 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251897667</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251898216</link>
         <description><![CDATA[<div>Molécula Íman</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 15:48:15 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251898216</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251913250</link>
         <description><![CDATA[<div>Se fragmentar-mos um íman, cada uma das partes resultantes, será um novo íman. Quer dizer que por mais que vezes que partamos, nunca iremos conseguir separar o polo norte com o polo sul.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 17:51:02 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251913250</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251913607</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/44bd6758f232c7a3677a5ca952ccb020/ima2.jpg" />
         <pubDate>2018-04-15 17:54:30 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251913607</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938163</link>
         <description><![CDATA[<div>Leis quantitativas das ações magnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:18:17 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938163</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938214</link>
         <description><![CDATA[<div>Pólos magnéticos do mesmo nome repelem-se.<br>Pólos magnéticos de nomes contrários, unem-se.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:18:53 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938214</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938511</link>
         <description><![CDATA[<div>Magnetização: conceitos e processos</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:22:01 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938511</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938558</link>
         <description><![CDATA[<div>Magnetização</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:22:37 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938558</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938588</link>
         <description><![CDATA[<div>por ímanes</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:22:59 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938588</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938625</link>
         <description><![CDATA[<div>por correntes</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:23:18 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938625</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938730</link>
         <description><![CDATA[<div>influência</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:24:21 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938730</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938807</link>
         <description><![CDATA[<div>contacto</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:25:19 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938807</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938817</link>
         <description><![CDATA[<div>fricção</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:25:24 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938817</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938976</link>
         <description><![CDATA[<pre>Magnetismo é uma <strong>força que exerce um poder de atração ou repulsão entre determinados objetos</strong></pre>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:27:24 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251938976</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940389</link>
         <description><![CDATA[<div>Desmagnetização: conceitos e processos</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:43:08 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940389</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940486</link>
         <description><![CDATA[<div>O processo de desmagnetização pode ser resultado de um processo natural ou artificial. Todos os materiais magnetizados sofrem uma depreciação das suas propriedades com o decorrer do tempo, particularmente nos ímanes permanentes. É um processo natural que não é alheio, entre outros, ao efeito do campo magnético terrestre.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:43:53 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940486</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940915</link>
         <description><![CDATA[<div>Fatores que levam à desmagnetização</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:49:04 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940915</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940987</link>
         <description><![CDATA[<div>Temperatura</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:49:53 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251940987</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251941031</link>
         <description><![CDATA[<div>Ações mecânicas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:50:39 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251941031</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251941077</link>
         <description><![CDATA[<div>Campos magnéticos exteriores</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-15 21:51:03 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/251941077</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252351683</link>
         <description><![CDATA[<div>Campo magnético e ação à distância</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 21:24:29 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252351683</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252353532</link>
         <description><![CDATA[<div>No magnetismo, "Campo", pode entender-se como: toda a região do espaço onde se fazem sentir as ações magnéticas. Analogamente ao campo eléctrico e ao campo gravítico, e muito embora as acções magnéticas tenham diferente natureza, elas caracterizam-se por não necessitarem de qualquer suporte físico ou meio material para o seu estabelecimento. Esta particularidade é chamada acção à distância e justifica a existência e propagação de campos magnéticos no vazio.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 21:34:05 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252353532</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358674</link>
         <description><![CDATA[<div>Caracterização do campo magnético</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:11:31 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358674</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358762</link>
         <description><![CDATA[<div>O conjunto de linhas de força configuram e identificam a existência de qualquer campo magnético numa certa região do espaço e constituem respectivo espectro magnético. Para além dos ímanes, são origem de campos magnéticos, como veremos, as correntes eléctricas e as massas gravíticas.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:12:14 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358762</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358829</link>
         <description><![CDATA[<div><figure class="attachment attachment--preview"><img src="https://lh3.googleusercontent.com/6qrBECGFKMQBGbJJoZ2kCLTF217fSF0tnaPs-6eXWkntqq1jfmm8Z29Ab0OhPTDTWaeKNLFDZXClpqGllqY2iZkicG-GFFn7ivn9YYmAWor5RsnuBx2FU8ZXl35dnoqt3Qz6zzzOzoE" width="336" height="178"><figcaption class="attachment__caption"></figcaption></figure></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:12:53 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252358829</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359000</link>
         <description><![CDATA[<div>Interação de campos magnéticos</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:14:30 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359000</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359073</link>
         <description><![CDATA[<div>A suficiente proximidade de dois campos magnéticos altera as suas configurações iniciais. Nas figuras seguintes representam-se os campos magnéticos resultantes de dois ímanes em duas situações distintas: atracção e repulsão mútuas, respectivamente.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:15:05 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359073</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359301</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/f437cd2b5e8da29348bc9a79f5c53555/interacao_polos.jpg" />
         <pubDate>2018-04-16 22:16:42 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359301</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359438</link>
         <description><![CDATA[<div>Permeabilidade magnética</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:17:59 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359438</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359488</link>
         <description><![CDATA[<div>A permeabilidade ou condutibilidade magnética de uma substância traduz a maior ou menor facilidade com que essa substância se deixa atravessar pelas linhas de força.<br><br></div><div>Será de esperar, por exemplo, que duas massas polares do mesmo nome, mergulhadas no vazio, sofram uma força mútua de repulsão diferente daquela que será de observar se o meio onde elas se encontram for outro qualquer.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:18:30 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359488</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359608</link>
         <description><![CDATA[<div> Classificação das susbtâncias</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:19:37 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359608</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359660</link>
         <description><![CDATA[<div>Ferromagnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:20:13 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359660</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359682</link>
         <description><![CDATA[<div>Paramagnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:20:23 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359682</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359699</link>
         <description><![CDATA[<div>Diamagnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:20:32 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359699</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359715</link>
         <description><![CDATA[<div>Amagnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:20:39 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252359715</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360504</link>
         <description><![CDATA[<div>Campo magnético uniforme</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:26:41 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360504</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360586</link>
         <description><![CDATA[<div>Um campo magnético diz-se uniforme quando em qualquer um dos seus pontos é constante o vector indução magnética. As linhas de força são paralelas entre si e igualmente espaçadas.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:27:25 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360586</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360795</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/30dcceb00249342722ea2b216c19a207/ima_em_forma_de_barra.jpg" />
         <pubDate>2018-04-16 22:28:28 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360795</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360982</link>
         <description><![CDATA[<div>Grandezas Magnéticas</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:29:51 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252360982</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252361215</link>
         <description><![CDATA[<div>O conjunto das linhas de força que saem do pólo norte em direção ao pólo sul representam um fluxo magnético cuja intensidade e denunciada a partir linhas de força.<br><br></div><div><mark>A unidade SI de fluxo magnético é o weber (Wb).</mark></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-16 22:31:34 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252361215</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252361565</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/790cbe092c1af5f30c96b111abae930f/Fluxo_Magn_tico_Atrav_s_de_uma_Espira.jpg" />
         <pubDate>2018-04-16 22:34:03 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252361565</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252451700</link>
         <description><![CDATA[<div>Corrente elétrica induzida</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 07:50:31 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252451700</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252452119</link>
         <description><![CDATA[<div>Sabemos que quando uma diferença de potencial é aplicada sobre um circuito há o surgimento de uma corrente elétrica induzida, chamada força eletromotriz.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 07:52:17 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252452119</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453623</link>
         <description><![CDATA[<div>O valor da força electromotriz induzida em uma espira de área A é igual à taxa de variação do fluxo magnético através dessa espira. Matematicamente.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 07:59:15 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453623</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453679</link>
         <description><![CDATA[<div>Lei de Faraday</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 07:59:29 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453679</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453955</link>
         <description><![CDATA[<div>Corrente elétrica alternada</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:00:51 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252453955</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252454380</link>
         <description><![CDATA[<div>Um tipo de corrente eléctrica em que o fluxo de elétrons que atravessa um condutor tem sentido variante possuindo a característica de ser variante no tempo, ou seja, não segue um sentido único. É utilizada em várias aplicações, como sistemas de grandes potencias, indústrias e máquinas eléctricas. A corrente que chega a sua casa, por exemplo, é do tipo alternada. Isso porque a corrente precisa percorrer longas distancias, da usina de geração de energia até chegar à tomada. Quando essa energia é transmitida por uma corrente alternada, ela não perde muita força no meio caminho.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:03:09 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252454380</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252455417</link>
         <description><![CDATA[<div>Transformadores</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:06:46 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252455417</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252455696</link>
         <description><![CDATA[<div>São equipamentos utilizados na transformação de valores de tensão e corrente, além de serem usados na modificação de impedâncias em circuitos eléctricos. O principio de funcionamento de um transformador é baseado nas leis de Faraday e Lens as leis do electromagnetismo e da indução electromagnética, respectivamente.<br>Estes equipamentos possuem mais de um enrolamento, sendo que estas partes são chamadas de primário e secundário em casos de transformadores com dois enrolamentos, e em transformadores que possuem três enrolamentos, além dos dois nomes já citados, o terceiro enrolamento é denominado terciário.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:07:53 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252455696</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252456796</link>
         <description><![CDATA[<div>Lei de Lenz</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:12:14 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252456796</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252457207</link>
         <description><![CDATA[<div>Segundo a lei proposta pelo físico russo Heinrich Lenz, a partir de resultados experimentais, a corrente induzida tem sentido oposto ao sentido da variação do campo magnético que a gera.<br><br></div><ul><li>Se houver diminuição do fluxo magnético, a corrente induzida irá criar um campo magnético com o mesmo sentido do fluxo;</li><li>Se houver aumento do fluxo magnético, a corrente induzida irá criar um campo magnético com sentido oposto ao sentido do fluxo.</li></ul><div><br></div><div>Se usarmos como exemplo, uma espira posta no plano de uma página e a submetermos a um fluxo magnético que tem direção perpendicular à página e com sentido de entrada na folha.<br><br></div><ul><li>Se for positivo, ou seja, se a fluxo magnético aumentar, a corrente induzida terá sentido anti-horário;</li><li>Se for negativo, ou seja, se a fluxo magnético diminuir, a corrente induzida terá sentido horário.</li></ul>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:13:23 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252457207</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252460409</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/487dae4ba240fbf7977ba1a302851abe/transferir.jpg" />
         <pubDate>2018-04-17 08:23:15 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252460409</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252462558</link>
         <description><![CDATA[<div>Força magnética</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:28:42 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252462558</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252462701</link>
         <description><![CDATA[<div>A força magnética é uma consequência da força eletromagnética, uma das quatro forças fundamentais da natureza. Ela ocorre sempre que objetos interagem, nos quais há <strong>carga em movimento</strong>. Dois objetos, contendo carga, ao movimentarem-se no mesmo sentido possuem uma força magnética de atração entre eles. Similarmente, objetos com cargas se movimentando em direções opostas possuem uma força repulsiva entre eles.</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-04-17 08:29:14 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252462701</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252463339</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/93226b9f04c3f898125f81c3432def46/fm_3.jpg" />
         <pubDate>2018-04-17 08:31:39 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252463339</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252472455</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/67a3fb3c9fff3b188426cafa6dfceaaa/5f2a15afaa9d484a34af0c5ea9885359.gif" />
         <pubDate>2018-04-17 09:04:36 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252472455</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252473899</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/f5c13fe5635fc922fa11287d5d72ab65/maxresdefault.jpg" />
         <pubDate>2018-04-17 09:09:23 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252473899</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252474301</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/272265948/a1ad34de9f528bd8660d9e9832bcdb6e/thumbnaild.jpg" />
         <pubDate>2018-04-17 09:10:41 UTC</pubDate>
         <guid>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252474301</guid>
      </item>
      <item>
         <title></title>
         <author>franciscojrmc</author>
         <link>https://padlet.com/franciscojrmc/zzs2otqmus4r/wish/252474619</link>
         <description><![CDATA[]]></description>
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         <pubDate>2018-04-17 09:21:15 UTC</pubDate>
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         <description><![CDATA[<div>Lei da mão direita</div>]]></description>
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         <description><![CDATA[<div>A seguinte regra nos ensina a descobrir o lado para o qual a agulha da bússola será desviada quando submetida à ação da corrente elétrica: Coloca-se a mão direita de modo que o dedo indicador aponte na direção da corrente; a palma da mão deve estar voltada para a agulha; o fio condutor ficará situado entre a mão e a bússola; isto feito, a direção do polegar estendido apontará a direção do desvio que o pólo norte da agulha vai sofrer.</div>]]></description>
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