{"id":80432,"date":"2024-01-14T13:04:21","date_gmt":"2024-01-14T13:04:21","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/equacao-da-lei-de-coulomb-formula-e-calculo\/"},"modified":"2024-01-20T09:46:57","modified_gmt":"2024-01-20T09:46:57","slug":"equacao-da-lei-de-coulomb-formula-e-calculo","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/equacao-da-lei-de-coulomb-formula-e-calculo\/","title":{"rendered":"Equa\u00e7\u00e3o da Lei de Coulomb | F\u00f3rmula e C\u00e1lculo"},"content":{"rendered":"

Lei de Coulomb e Sua Equa\u00e7\u00e3o<\/h2>\n

A Lei de Coulomb \u00e9 um princ\u00edpio fundamental da f\u00edsica que descreve as for\u00e7as el\u00e9tricas agindo entre part\u00edculas eletricamente carregadas. Esta lei \u00e9 crucial para entender como as cargas interagem umas com as outras e tem diversas aplica\u00e7\u00f5es pr\u00e1ticas no nosso dia a dia.<\/p>\n

Forma Escalar da Lei de Coulomb<\/h2>\n

A forma escalar da Lei de Coulomb apresenta a magnitude da for\u00e7a eletrost\u00e1tica \\(F\\) entre duas cargas pontuais, mas n\u00e3o indica a sua dire\u00e7\u00e3o. A f\u00f3rmula \u00e9 expressa como:<\/p>\n

\\[ F = \\frac{k \\cdot |q_1 \\cdot q_2|}{r^2} \\]<\/p>\n

Onde \\(k\\) ou \\(k_e\\) \u00e9 a constante de Coulomb (\\(k_e \u2248 8.988\u00d710^9 N\u22c5m^2\u22c5C^{-2}\\)), \\(q_1\\) e \\(q_2\\) s\u00e3o as magnitudes das cargas e \\(r\\) \u00e9 a dist\u00e2ncia entre as cargas. Essa rela\u00e7\u00e3o mostra que a for\u00e7a \u00e9 diretamente proporcional ao produto das cargas e inversamente proporcional ao quadrado da dist\u00e2ncia entre elas.<\/p>\n

Implica\u00e7\u00f5es da Lei de Coulomb<\/h2>\n

Quanto maior a carga nos objetos, maior ser\u00e1 o campo eletrost\u00e1tico gerado. Inversamente, quanto maior a dist\u00e2ncia entre os objetos, mais fraco ser\u00e1 o campo eletrost\u00e1tico entre eles. Se \\(q_1\\) e \\(q_2\\) possu\u00edrem o mesmo sinal, a for\u00e7a ser\u00e1 repulsiva; se possu\u00edrem sinais opostos, a for\u00e7a ser\u00e1 atrativa.<\/p>\n

Aplica\u00e7\u00f5es Pr\u00e1ticas<\/h2>\n

A Lei de Coulomb tem in\u00fameras aplica\u00e7\u00f5es, desde m\u00e1quinas Xerox e impressoras a laser, at\u00e9 na purifica\u00e7\u00e3o de ar eletrost\u00e1tica e revestimento em p\u00f3. Al\u00e9m disso, \u00e9 fundamental para o c\u00e1lculo de for\u00e7as entre part\u00edculas carregadas, como pr\u00f3tons, ou entre objetos carregados.<\/p>\n

Lei de Coulomb na Forma Vetorial<\/h2>\n

A Lei de Coulomb tamb\u00e9m pode ser expressa na forma vetorial. Neste caso, a for\u00e7a eletrost\u00e1tica \u00e9 representada como:<\/p>\n

\\[ \\vec{F} = k \\cdot \\frac{q_1 \\cdot q_2}{r^2} \\cdot \\hat{r} \\]<\/p>\n

Onde \\( \\hat{r} \\) \u00e9 o vetor unit\u00e1rio que aponta ao longo do eixo radial que se estende atrav\u00e9s das duas part\u00edculas, radialmente afastado da part\u00edcula 2.<\/p>\n

Conclus\u00e3o<\/h2>\n

A Lei de Coulomb n\u00e3o \u00e9 apenas uma f\u00f3rmula matem\u00e1tica, mas uma chave para entender como as for\u00e7as el\u00e9tricas moldam o mundo ao nosso redor. Desde o n\u00edvel subat\u00f4mico at\u00e9 aplica\u00e7\u00f5es industriais, seu entendimento \u00e9 essencial para o progresso tecnol\u00f3gico e cient\u00edfico.<\/p>\n

\"\"<\/p>\n

\n Original Article<\/a>\n<\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Na equa\u00e7\u00e3o da lei de Coulomb, ke \u00e9 a constante de Coulomb, q1 e q2 s\u00e3o as magnitudes sinalizadas das cargas e o escalar r \u00e9 a dist\u00e2ncia entre as cargas.<\/p>\n","protected":false},"author":1,"featured_media":1994,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80432","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":"\nEqua\u00e7\u00e3o da Lei de Coulomb | F\u00f3rmula e C\u00e1lculo<\/title>\n<meta name=\"description\" content=\"Na equa\u00e7\u00e3o da lei de Coulomb, ke \u00e9 a constante de Coulomb, q1 e q2 s\u00e3o as magnitudes sinalizadas das cargas e o escalar r \u00e9 a dist\u00e2ncia entre as cargas.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.electricity-magnetism.org\/pt-br\/equacao-da-lei-de-coulomb-formula-e-calculo\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Equa\u00e7\u00e3o da Lei de Coulomb | F\u00f3rmula e C\u00e1lculo\" \/>\n<meta property=\"og:description\" content=\"Na equa\u00e7\u00e3o da lei de Coulomb, ke \u00e9 a constante de Coulomb, q1 e q2 s\u00e3o as magnitudes sinalizadas das cargas e o escalar r \u00e9 a dist\u00e2ncia entre as cargas.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.electricity-magnetism.org\/pt-br\/equacao-da-lei-de-coulomb-formula-e-calculo\/\" \/>\n<meta property=\"og:site_name\" content=\"Electricity - 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