{"id":80708,"date":"2024-01-14T13:16:42","date_gmt":"2024-01-14T13:16:42","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/corrente-cc-definicao-caracteristicas-e-medicao\/"},"modified":"2024-01-20T10:00:08","modified_gmt":"2024-01-20T10:00:08","slug":"corrente-cc-definicao-caracteristicas-e-medicao","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/corrente-cc-definicao-caracteristicas-e-medicao\/","title":{"rendered":"Corrente CC | Defini\u00e7\u00e3o, caracter\u00edsticas e medi\u00e7\u00e3o"},"content":{"rendered":"<h2>Corrente Cont\u00ednua (DC): Entendendo o Fluxo de Carga El\u00e9trica<\/h2>\n<p>A corrente el\u00e9trica representa o fluxo de carga el\u00e9trica atrav\u00e9s de um material. Na unidade do Sistema Internacional (SI), a corrente \u00e9 medida em coulomb por segundo, ou amp\u00e8re (A), que \u00e9 uma unidade b\u00e1sica do SI. Um amp\u00e8re \u00e9 igual a 1 coulomb por segundo, representado por 1 A = 1 C\/s. A corrente cont\u00ednua (DC), especificamente, \u00e9 um tipo de corrente el\u00e9trica que flui em apenas uma dire\u00e7\u00e3o. Esse fluxo constante e unidirecional \u00e9 comumente fornecido por uma bateria ou uma fonte de alimenta\u00e7\u00e3o DC.<\/p>\n<h2>Caracter\u00edsticas e Medi\u00e7\u00e3o da Corrente Cont\u00ednua<\/h2>\n<p>Entre as principais caracter\u00edsticas da corrente cont\u00ednua est\u00e3o:<\/p>\n<ul>\n<li>Fluxo unidirecional: A corrente DC flui somente em uma dire\u00e7\u00e3o, do terminal positivo para o negativo da fonte de energia.<\/li>\n<li>Tens\u00e3o constante: Em um circuito DC, a tens\u00e3o permanece constante ao longo do tempo.<\/li>\n<li>Corrente est\u00e1vel: A corrente tamb\u00e9m permanece constante, desde que o circuito permane\u00e7a fechado e a fonte de energia forne\u00e7a uma tens\u00e3o constante.<\/li>\n<li>Frequ\u00eancia baixa: A corrente DC tem uma frequ\u00eancia de 0 Hz, o que significa que n\u00e3o oscila como a corrente alternada (AC).<\/li>\n<li>Polariza\u00e7\u00e3o: A corrente DC pode causar polariza\u00e7\u00e3o nos condutores.<\/li>\n<li>Transmiss\u00e3o: A corrente DC n\u00e3o \u00e9 facilmente transformada ou transmitida a longas dist\u00e2ncias devido \u00e0 perda de energia por resist\u00eancia.<\/li>\n<\/ul>\n<p>Para medir a corrente DC, pode-se usar um amper\u00edmetro DC ou um alicate amper\u00edmetro DC. O amper\u00edmetro DC \u00e9 conectado em s\u00e9rie ao circuito, enquanto o alicate amper\u00edmetro mede a corrente sem a necessidade de desconectar o fio, atrav\u00e9s da detec\u00e7\u00e3o do campo magn\u00e9tico gerado pela corrente.<\/p>\n<h2>Fontes de Corrente Cont\u00ednua<\/h2>\n<p>As fontes comuns de corrente DC incluem:<\/p>\n<ul>\n<li>Baterias: Geram corrente DC atrav\u00e9s de rea\u00e7\u00f5es qu\u00edmicas entre eletrodos e eletr\u00f3litos.<\/li>\n<li>Fontes de alimenta\u00e7\u00e3o DC: Convertem a tens\u00e3o AC de uma tomada em tens\u00e3o DC.<\/li>\n<li>C\u00e9lulas solares: Geram corrente DC diretamente da luz solar.<\/li>\n<li>Geradores DC: Convertem energia mec\u00e2nica em energia el\u00e9trica.<\/li>\n<li>C\u00e9lulas de combust\u00edvel: Convertem a energia de combust\u00edveis em energia el\u00e9trica DC.<\/li>\n<\/ul>\n<h2>Tipos de Corrente El\u00e9trica<\/h2>\n<p>Existem tr\u00eas tipos principais de corrente el\u00e9trica:<\/p>\n<ul>\n<li>Corrente Direta (DC): Fluxo de carga el\u00e9trica em uma dire\u00e7\u00e3o com magnitude e dire\u00e7\u00e3o constantes.<\/li>\n<li>Corrente Alternada (AC): Fluxo de carga el\u00e9trica que muda de dire\u00e7\u00e3o periodicamente.<\/li>\n<li>Corrente Pulsada DC: Fluxo de carga el\u00e9trica em pulsos ou rajadas, usada em aplica\u00e7\u00f5es especializadas.<\/li>\n<\/ul>\n<h2>Mecanismos de Fluxo de Corrente El\u00e9trica<\/h2>\n<p>Em condutores met\u00e1licos, como cobre ou alum\u00ednio, alguns el\u00e9trons s\u00e3o livres para se mover dentro do material. Eles se movem aleatoriamente, mas n\u00e3o escapam do material devido \u00e0 atra\u00e7\u00e3o pelos \u00edons positivos. Quando uma diferen\u00e7a de tens\u00e3o \u00e9 aplicada, cria-se um campo el\u00e9trico que exerce for\u00e7a sobre os el\u00e9trons livres, causando seu movimento e, consequentemente, a corrente el\u00e9trica.<\/p>\n<p>A velocidade de deriva dos el\u00e9trons em um condutor \u00e9 tipicamente lenta, na ordem de mil\u00edmetros por segundo, embora a corrente possa ser alta. Em dispositivos el\u00e9tricos e eletr\u00f4nicos, os sinais viajam como ondas eletromagn\u00e9ticas tipicamente a 50%\u201399% da velocidade da luz no v\u00e1cuo, enquanto os pr\u00f3prios el\u00e9trons se movem muito mais lentamente.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" alt=\"\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/dc-current\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um fluxo de carga el\u00e9trica que flui em uma dire\u00e7\u00e3o \u00e9 chamado de corrente cont\u00ednua. A magnitude e a dire\u00e7\u00e3o da DC permanecem constantes ao longo do tempo.<\/p>\n","protected":false},"author":1,"featured_media":1581,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80708","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nao-categorizado","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Corrente CC | Defini\u00e7\u00e3o, caracter\u00edsticas e medi\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Um fluxo de carga el\u00e9trica que flui em uma dire\u00e7\u00e3o \u00e9 chamado de corrente cont\u00ednua. 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