{"id":278,"date":"2023-06-22T17:51:46","date_gmt":"2023-06-22T17:51:46","guid":{"rendered":"https:\/\/physigeek.com\/pt\/ohm\/"},"modified":"2023-06-22T17:51:46","modified_gmt":"2023-06-22T17:51:46","slug":"ohm","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/ohm\/","title":{"rendered":"Ohm"},"content":{"rendered":"<p>Neste artigo voc\u00ea aprender\u00e1 o significado de um ohm na f\u00edsica e quanto um ohm \u00e9 expresso em outras unidades. Al\u00e9m disso, voc\u00ea pode converter entre diferentes unidades el\u00e9tricas usando uma calculadora online.<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-un-ohmio\"><\/span> O que \u00e9 um ohm?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> O <strong>ohm<\/strong> (ou <strong>ohm<\/strong> ) \u00e9 a unidade do Sistema Internacional (SI) para resist\u00eancia el\u00e9trica. Em outras palavras, o ohm \u00e9 uma unidade el\u00e9trica usada para expressar valores de resist\u00eancia.<\/p>\n<p> O s\u00edmbolo para ohm \u00e9 a letra grega mai\u00fascula \u00f4mega (\u03a9). No entanto, a abreviatura <em>ohm<\/em> tamb\u00e9m \u00e9 usada algumas vezes.<\/p>\n<p> Na f\u00edsica, o ohm \u00e9 definido como a resist\u00eancia el\u00e9trica que existe entre dois pontos de um condutor atravessado por uma corrente de 1 A quando existe uma diferen\u00e7a de potencial de 1 volt entre esses pontos.<\/p>\n<p> O nome desta unidade el\u00e9trica foi batizado em homenagem ao f\u00edsico alem\u00e3o Georg Simon Ohm, j\u00e1 que foi ele quem inventou a lei de Ohm.<\/p>\n<p> Resumindo, o ohm mede a dificuldade de passagem da corrente el\u00e9trica. Portanto, quanto mais ohms um resistor tiver, mais dif\u00edcil ser\u00e1 para a corrente el\u00e9trica passar por ele. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Multiplos-y-submultiplos-del-ohmio\"><\/span> M\u00faltiplos e subm\u00faltiplos de ohm<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Agora que vimos a defini\u00e7\u00e3o de ohm, vamos ver quais s\u00e3o os m\u00faltiplos e subm\u00faltiplos desta medida el\u00e9trica.<\/p>\n<p> Os <strong>m\u00faltiplos do ohm<\/strong> s\u00e3o os seguintes:<\/p>\n<figure class=\"wp-block-table is-style-stripes\">\n<table>\n<thead>\n<tr>\n<th> nome<\/th>\n<th class=\"has-text-align-center\" data-align=\"center\"> S\u00edmbolo<\/th>\n<th class=\"has-text-align-center\" data-align=\"center\"> Diversos<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td> decaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> da\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>1\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> hectoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> h\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>2\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> quiloohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> k\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>3\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> megaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> M\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>6\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> gigaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> G\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>9\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> teraohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> T\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>12\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> petohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> P\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>15\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> Exaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> E\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>18\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> zetaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> Z\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>21\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> yottaohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> Sim<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>24<\/sup> ohms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p> Por outro lado, os <strong>subm\u00faltiplos do ohm<\/strong> s\u00e3o os seguintes:<\/p>\n<figure class=\"wp-block-table is-style-stripes\">\n<table>\n<thead>\n<tr>\n<th> nome<\/th>\n<th class=\"has-text-align-center\" data-align=\"center\"> S\u00edmbolo<\/th>\n<th class=\"has-text-align-center\" data-align=\"center\"> subm\u00faltiplo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td> deciohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> d\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-1\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> centoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> c\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-2\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> miliohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> m\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-3\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> microohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> \u03bc\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-6\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> nanoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> n\u00e3o<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-9<\/sup> ohms<\/td>\n<\/tr>\n<tr>\n<td> picohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> p\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-12\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> femtoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> f\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-15\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> atoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> ah<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-18<\/sup> ohms<\/td>\n<\/tr>\n<tr>\n<td> zeptoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> z\u03a9<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-21\u03a9<\/sup><\/td>\n<\/tr>\n<tr>\n<td> yoctoohm<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> Sim<\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"> 10 <sup>-24\u03a9<\/sup> <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Calculadora-para-convertir-ohmios-a-otras-unidades\"><\/span> Calculadora para converter ohms em outras unidades<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Voc\u00ea pode usar o seguinte conversor para converter entre m\u00faltiplos e subm\u00faltiplos de ohms.<\/p>\n<p> Basta inserir o valor da resist\u00eancia el\u00e9trica, unidades de convers\u00e3o e pressionar o bot\u00e3o \u201cConverter\u201d. Voc\u00ea deve usar o ponto final como separador decimal, por exemplo 52.09. <\/p>\n<form action=\"\" method=\"post\">\n<div align=\"center\" style=\"line-height:50px; background:#FEF9E7; padding:15px; border:2px solid #4FD12F; border-radius:15px; margin-bottom:20px\"><input name=\"datos\" style=\"border:1.5px solid #4FD12F; border-radius:5px;  padding:7px; color:#000000; width: 100px\" placeholder=\"1\" required=\"\" oninvalid=\"this.setCustomValidity('Introduce el valor de la resistencia aqu\u00ed')\" oninput=\"this.setCustomValidity('')\"><select name=\"unidad1\" style=\"border:1.5px solid #4FD12F; border-radius:5px;  padding:7px; color:#000000; width: 130px\"><option value=\"1unidad21\"> Yottaohm (Y\u03a9)<\/option><option value=\"1unidad20\"> Zettaohm (Z\u03a9)<\/option><option value=\"1unidad19\"> Exaohm (E\u03a9)<\/option><option value=\"1unidad18\"> Petohm (P\u03a9)<\/option><option value=\"1unidad17\"> Terohm (T\u03a9)<\/option><option value=\"1unidad16\"> Gigaohm (G\u03a9)<\/option><option value=\"1unidad1\"> Megaohm (M\u03a9)<\/option><option disabled=\"disabled\" value=\"\"><\/option><option value=\"1unidad2\"> Quiloohm (k\u03a9)<\/option><option value=\"1unidad3\"> Hectoohm (h\u03a9)<\/option><option value=\"1unidad4\"> Decaohm (da\u03a9)<\/option><option value=\"1unidad5\" selected=\"selected\"> Ohm (\u03a9)<\/option><option value=\"1unidad6\"> Deciohm (d\u03a9)<\/option><option value=\"1unidad7\"> Centiohm (c\u03a9)<\/option><option value=\"1unidad8\"> Miliohm (m\u03a9)<\/option><option disabled=\"disabled\" value=\"\"><\/option><option value=\"1unidad9\"> Microohms (\u00b5\u03a9)<\/option><option value=\"1unidad10\"> Nanoohm (n\u03a9)<\/option><option value=\"1unidad11\"> Picohm (p\u03a9)<\/option><option value=\"1unidad12\"> Femtoohm (f\u03a9)<\/option><option value=\"1unidad13\"> Atoohm (a\u03a9)<\/option><option value=\"1unidad14\"> Zeptoohm (z\u03a9)<\/option><option value=\"1unidad15\"> Yoctoohm (y\u03a9)<\/option><\/select> <span style=\"color:#4FD12F\">\u279c<\/span> <select name=\"unidad2\" style=\"border:1.5px solid #4FD12F; border-radius:5px;  padding:7px; color:#000000; width: 130px\"><option value=\"2unidad21\"> Yottaohm (Y\u03a9)<\/option><option value=\"2unidad20\"> Zettaohm (Z\u03a9)<\/option><option value=\"2unidad19\"> Exaohm (E\u03a9)<\/option><option value=\"2unidad18\"> Petohm (P\u03a9)<\/option><option value=\"2unidad17\"> Terohm (T\u03a9)<\/option><option value=\"2unidad16\"> Gigaohm (G\u03a9)<\/option><option value=\"2unidad1\"> Megaohm (M\u03a9)<\/option><option disabled=\"disabled\" value=\"\"><\/option><option value=\"2unidad2\" selected=\"selected\">Quiloohm (k\u03a9)<\/option><option value=\"2unidad3\"> Hectoohm (h\u03a9)<\/option><option value=\"2unidad4\"> Decaohm (da\u03a9)<\/option><option value=\"2unidad5\"> Ohm (\u03a9)<\/option><option value=\"2unidad6\"> Deciohm (d\u03a9)<\/option><option value=\"2unidad7\"> Centiohm (c\u03a9)<\/option><option value=\"2unidad8\"> Miliohm (m\u03a9)<\/option><option disabled=\"disabled\" value=\"\"><\/option><option value=\"2unidad9\"> Microohms (\u00b5\u03a9)<\/option><option value=\"2unidad10\"> Nanoohm (n\u03a9)<\/option><option value=\"2unidad11\"> Picohm (p\u03a9)<\/option><option value=\"2unidad12\"> Femtoohm (f\u03a9)<\/option><option value=\"2unidad13\"> Atoohm (a\u03a9)<\/option><option value=\"2unidad14\"> Zeptoohm (z\u03a9)<\/option><option value=\"2unidad15\"> Yoctoohm (y\u03a9) <\/option><\/select><\/p>\n<div style=\"text-align:center\"><input align=\"center\" style=\"font-size:105%; border-radius:30px; margin-top: 20px; margin-bottom:15px\" type=\"submit\" name=\"submit\" value=\"Converter\"><\/div>\n<\/div>\n<\/form>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ley-de-Ohm\"><\/span>Lei de Ohm<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Por fim, veremos em que consiste a lei de Ohm, pois esta lei f\u00edsica nos permite relacionar matematicamente a intensidade da corrente, a diferen\u00e7a de tens\u00e3o e a resist\u00eancia el\u00e9trica.<\/p>\n<p> <strong>A lei de Ohm<\/strong> afirma que a diferen\u00e7a de potencial entre dois pontos \u00e9 equivalente \u00e0 intensidade da corrente multiplicada pela resist\u00eancia el\u00e9trica entre esses pontos:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-111a7f4c15724160f04805b178454613_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" V=I\\cdot R\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"74\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Assim, da equa\u00e7\u00e3o anterior podemos deduzir que a resist\u00eancia el\u00e9trica entre dois pontos pode ser calculada dividindo a diferen\u00e7a de tens\u00e3o pela intensidade da corrente:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-6fbed7f3fa3c40e44d404b83e1c3f579_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" R=\\cfrac{V}{I}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"54\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p> As unidades de tens\u00e3o e corrente el\u00e9trica no sistema internacional s\u00e3o o volt e o ampere, respectivamente. Portanto, um ohm \u00e9 igual a um volt dividido por um ampere.<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-74eb9ecd268fcb3908d0712422c8dd35_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" 1\\ \\Omega =\\cfrac{1 \\ V}{1 \\ A}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"82\" style=\"vertical-align: -12px;\"><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Neste artigo voc\u00ea aprender\u00e1 o significado de um ohm na f\u00edsica e quanto um ohm \u00e9 expresso em outras unidades. Al\u00e9m disso, voc\u00ea pode converter entre diferentes unidades el\u00e9tricas usando uma calculadora online. O que \u00e9 um ohm? O ohm (ou ohm ) \u00e9 a unidade do Sistema Internacional (SI) para resist\u00eancia el\u00e9trica. Em outras &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/pt\/ohm\/\"> <span class=\"screen-reader-text\">Ohm<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-278","post","type-post","status-publish","format-standard","hentry","category-unidades"],"yoast_head":"<!-- This site is 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