{"id":1880,"date":"2016-02-11T18:00:35","date_gmt":"2016-02-11T18:00:35","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=1880"},"modified":"2024-08-19T14:06:00","modified_gmt":"2024-08-19T14:06:00","slug":"capacitores-condensadores","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/eletricidade\/eletrodinamica\/capacitores-condensadores\/","title":{"rendered":"Capacitores (Condensadores)"},"content":{"rendered":"

Capacitores (Condensadores)<\/b><\/span><\/span><\/span><\/p>\n

Capacitor ou condensador\u00a0<\/b><\/span><\/span><\/span><\/p>\n

Capacitor ou condensador\u00a0<\/b><\/span><\/span><\/span>\u00e9 um <\/b><\/span><\/span><\/span>dispositivo el\u00e9trico que tem por fun\u00e7\u00e3o armazenar cargas el\u00e9tricas e, como consequ\u00eancia, energia potencial el\u00e9trica.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Existem <\/b><\/span><\/span><\/span>diversos <\/b><\/span><\/span><\/span>tipos <\/b><\/span><\/span><\/span>de capacitores (cil\u00edndricos, esf\u00e9ricos ou planos), mas todos s\u00e3o representados por duas placas paralelas,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>condutoras e id\u00eanticas, bem pr\u00f3ximas uma da outra e com<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

um\u00a0isolante\u00a0chamado diel\u00e9trico\u00a0entre elas<\/b><\/span><\/span><\/span>. Essas\u00a0<\/b><\/span><\/span><\/span>placas<\/b><\/span><\/span><\/span> s\u00e3o\u00a0<\/b><\/span><\/span><\/span>denominadas\u00a0armaduras do capacitor\u00a0<\/b><\/span><\/span><\/span>e o <\/b><\/span><\/span><\/span>diel\u00e9trico (isolante) entre elas pode ser v\u00e1cuo, ar, papel, mica, \u00f3leo, etc.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

Eletrizando um capacitor (processo de carga)<\/b><\/span><\/span><\/span><\/p>\n

Na figura, as <\/b><\/span><\/span><\/span>armaduras do capacitor est\u00e3o inicialmente neutras <\/b><\/span><\/span><\/span>e a <\/b><\/span><\/span><\/span>diferen\u00e7a de potencial <\/b><\/span><\/span><\/span>entre as placas <\/b><\/span><\/span><\/span>\u00e9 nula<\/b><\/span><\/span><\/span>. A seguir uma das <\/b><\/span><\/span><\/span>armaduras \u00e9 ligada ao polo positivo de um gerador de for\u00e7a eletromotriz \u0190 e a outra ao polo negativo do mesmo gerador.<\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span><\/span>armadura ligada ao polo negativo do gerador vai sendo carregada com cargas negativas <\/b><\/span><\/span><\/span>(retirando el\u00e9trons da placa de cima) e a <\/b><\/span><\/span><\/span>ligada <\/b><\/span><\/span><\/span>ao <\/b><\/span><\/span><\/span>polo positivo do gerador vai sendo carregada com cargas positivas <\/b><\/span><\/span><\/span>(acrescentando el\u00e9trons \u00e0 placa de baixo) e \u00e0 medida que elas v\u00e3o <\/b><\/span><\/span><\/span>sendo carregadas a diferen\u00e7a de potencial entre as placas vai aumentando <\/b><\/span><\/span><\/span>at\u00e9 que ela se <\/b><\/span><\/span><\/span>iguale \u00e0 do gerador (E) e o<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

capacitor est\u00e1 carregado com tens\u00e3o U = \u0190. <\/b><\/span><\/span><\/span><\/p>\n

Por defini\u00e7\u00e3o a <\/b><\/span><\/span><\/span>carga el\u00e9trica (Q) desse capacitor \u00e9 o valor da carga da placa positiva. <\/b><\/span><\/span><\/span>Lembre-se de que as <\/b><\/span><\/span><\/span>cargas das placas positiva e negativa tem o mesmo m\u00f3dulo.<\/b><\/span><\/span><\/span><\/p>\n

U<\/b><\/span><\/span><\/span> \u00e9 a <\/b><\/span><\/span><\/span>diferen\u00e7a de potencial entre as placas positiva e negativa<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span><\/span>Q o m\u00f3dulo da carga de uma\u00a0das placas.<\/b><\/span><\/span><\/span><\/p>\n

Processo de descarga de um capacitor<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\"\"<\/p>\n

Capacit\u00e2ncia ou capacidade eletrost\u00e1tica de um capacitor<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

A <\/b><\/span><\/span><\/span>capacit\u00e2ncia ou capacidade eletrost\u00e1tica de um capacitor<\/b><\/span><\/span><\/span> representada pela <\/b><\/span><\/span><\/span>letra C <\/b><\/span><\/span><\/span>\u00e9 <\/b><\/span><\/span><\/span>caracter\u00edstica <\/b><\/span><\/span><\/span>de <\/b><\/span><\/span><\/span>cada capacitor, <\/b><\/span><\/span><\/span>sendo definida como a <\/b><\/span><\/span><\/span>raz\u00e3o entre a carga\u00a0Q\u00a0(medida em coulomb \u201cC\u201d no SI)\u00a0armazenada no capacitor e a diferen\u00e7a de potencial\u00a0U\u00a0(medida em volt \u201cV\u201d, no SI)\u00a0entre as armaduras positiva e negativa, ou seja:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0No <\/b><\/span><\/span><\/span>Sistema Internacional de Unidades (SI)\u00a0<\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>capacit\u00e2ncia (capacidade) <\/b><\/span><\/span><\/span>\u00e9 medida em\u00a0<\/b><\/span><\/span><\/span>farad,\u00a0<\/b><\/span><\/span><\/span>cujo s\u00edmbolo \u00e9\u00a0<\/b><\/span><\/span><\/span>F<\/b><\/span><\/span><\/span>, contudo, como o <\/b><\/span><\/span><\/span>farad \u00e9 muito grande torna-se conveniente a utiliza\u00e7\u00e3o de subm\u00faltiplos, como o microfarad (1 \u03bcF = 10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>F), ou o picofarad (1pF=10<\/b><\/span><\/span><\/span>-12<\/b><\/span><\/span><\/sup><\/span>F).<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0<\/span><\/p>\n

\"\"<\/p>\n

\u00a0\"\"<\/span><\/p>\n

\u00a0Os capacitores s\u00e3o muito usados em <\/b><\/span><\/span><\/span>circuitos eletr\u00f4nicos<\/b><\/span><\/span><\/span>, onde eles <\/b><\/span><\/span><\/span>acumulam carga el\u00e9trica<\/b><\/span><\/span><\/span> e consequentemente <\/b><\/span><\/span><\/span>energia el\u00e9trica <\/b><\/span><\/span><\/span>para <\/b><\/span><\/span><\/span>posteriormente utiliz\u00e1-la em um momento adequado<\/b><\/span><\/span><\/span>, como por exemplo, em <\/b><\/span><\/span><\/span>controles remoto, celulares, telefones<\/b><\/span><\/span><\/span> <\/b>sem fio, computadores, aparelhos de som<\/b><\/span><\/span><\/span><\/p>\n

\"\"fornos de microondas, flash de m\u00e1quina fotogr\u00e1fica, etc<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

O que voc\u00ea deve saber, informa\u00e7\u00f5es e dicas<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"\u00a0<\/span><\/p>\n

Fatores que influem da capacit\u00e2ncia de um capacitor<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0Como a <\/b><\/span><\/span><\/span>capacit\u00e2ncia de um capacitor <\/b><\/span><\/span><\/span>\u00e9 uma <\/b><\/span><\/span><\/span>constante caracter\u00edstica do mesmo<\/b><\/span><\/span><\/span>, ela <\/b><\/span><\/span><\/span>depende <\/b><\/span><\/span><\/span>de alguns <\/b><\/span><\/span><\/span>fatores\u00a0pr\u00f3prios de cada capacitor, que s\u00e3o:<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0<\/span>\u00c1rea das armadura \"\"<\/b><\/span><\/span><\/span> <\/b>a capacit\u00e2ncia C \u00e9 proporcional \u00e0 \u00e1rea S <\/b><\/span><\/span><\/span>de cada armadura, ou seja quanto <\/b><\/span><\/span><\/span>maior a \u00e1rea das armaduras, maior a capacit\u00e2ncia: C\"\"S.\u00a0<\/b><\/span><\/span><\/span><\/p>\n

A espessura (d) do diel\u00e9trico <\/b><\/span><\/span><\/span>\u00e9 um outro fator que <\/b><\/span><\/span><\/span>influi na capacit\u00e2ncia <\/b><\/span><\/span><\/span>(s\u00e3o inversamente proporcionais). <\/b><\/span><\/span><\/span><\/p>\n

Verifica-se que <\/b><\/span><\/span><\/span>quanto menor for a dist\u00e2ncia (d) entre as armaduras maior ser\u00e1 a capacit\u00e2ncia C do componente, ou seja:\u00a0C\"\".(1\/d).<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0O <\/b><\/span><\/span><\/span>diel\u00e9trico<\/b><\/span><\/span><\/span> tamb\u00e9m \u00e9 um fator <\/b><\/span><\/span><\/span>determinante na capacit\u00e2ncia<\/b><\/span><\/span><\/span>, de modo que a sua <\/b><\/span><\/span><\/span>natureza <\/b><\/span><\/span><\/span>influencia no valor dela de modo <\/b><\/span><\/span><\/span>diretamente proporcional, onde cada diel\u00e9trico tem sua caracter\u00edstica denominada permissividade do meio, de s\u00edmbolo\u00a0\u03b5.<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0Ent\u00e3o, tem-se\u00a0\"\" \u00a0<\/b><\/span><\/span><\/span>C= \u03b5.S\/d<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0Quando o <\/b><\/span><\/span><\/span>meio<\/b><\/span><\/span><\/span> \u00e9 o <\/b><\/span><\/span><\/span>v\u00e1cuo,<\/b><\/span><\/span><\/span> sua <\/b><\/span><\/span><\/span>permissividade \u00e9 denominada\u00a0\u03b5<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>\u00a0e vale\u00a0\u03b5<\/b><\/span><\/span><\/span>o <\/b><\/span><\/span><\/sub><\/span>= 8,85.10<\/b><\/span><\/span><\/span>-12 <\/b><\/span><\/span><\/sup><\/span>F\/m.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span>A constante diel\u00e9trica (K) <\/b><\/span><\/span><\/span>de um meio <\/b><\/span><\/span><\/span>\u00e9 definida <\/b><\/span><\/span><\/span>como sendo a <\/b><\/span><\/span><\/span>raz\u00e3o entre a permissividade desse meio\u00a0\u03b5\u00a0e a permissividade\u00a0do v\u00e1cuo\u00a0\u03b5<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>\u00a0 \"\"<\/b><\/span><\/span><\/span>\u00a0\u00a0<\/b><\/span><\/span><\/span>K =\u00a0\u03b5\/\u03b5<\/b><\/span><\/span><\/span>o\u00a0\u00a0\"\"<\/b><\/span><\/span><\/sub><\/span>\u00a0\u00a0<\/b><\/span><\/span><\/span>\u03b5 = K\u03b5<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>, que, substitu\u00eddo em\u00a0<\/b><\/span><\/span><\/span>C= \u03b5.S\/d\u00a0\"\"<\/b><\/span><\/span><\/span>\u00a0\u00a0<\/b><\/span><\/span><\/span><\/p>\n

C= K\u03b5<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.S\/d.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

O que voc\u00ea deve saber, informa\u00e7\u00f5es e dicas<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\"\"\u00a0 <\/span>Quanto maior a \u00e1rea (S) das armaduras, maior ser\u00e1 a capacit\u00e2ncia e vice versa.<\/b><\/span><\/span><\/span><\/p>\n

\"\" Quanto menor a dist\u00e2ncia (d) entre as armaduras, maior ser\u00e1 a capacit\u00e2ncia e vice versa.<\/b><\/span><\/span><\/span><\/p>\n

\"\" Quanto maior for a constante diel\u00e9trica K do isolante (diel\u00e9trico) maior ser\u00e1 a capacit\u00e2ncia e vice versa.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u00a0<\/span><\/p>\n

Associa\u00e7\u00e3o de capacitores<\/b><\/span><\/span><\/span><\/p>\n

Associa\u00e7\u00e3o s\u00e9rie de capacitores<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

No <\/b><\/span><\/span><\/span>processo de carga, <\/b><\/span><\/span><\/span>quando os <\/b><\/span><\/span><\/span>capacitores em s\u00e9rie <\/b><\/span><\/span><\/span>estiverem ligados ao <\/b><\/span><\/span><\/span>gerador de tens\u00e3o U<\/b><\/span><\/span><\/span>, as cargas que <\/b><\/span><\/span><\/span>saem de uma armadura ser\u00e3o deslocadas para a seguinte at\u00e9 que as <\/b><\/span><\/span><\/span>cargas de todas as armaduras tenham o mesmo m\u00f3dulo, ou seja, Q<\/b><\/span><\/span><\/span>1 <\/b><\/span><\/span><\/sub><\/span>= Q<\/b><\/span><\/span><\/span>2 <\/b><\/span><\/span><\/sub><\/span>= Q<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sub><\/span>=Q. <\/b><\/span><\/span><\/span><\/p>\n

Observe que, <\/b><\/span><\/span><\/span>se as <\/b><\/span><\/span><\/span>cargas s\u00e3o iguais<\/b><\/span><\/span><\/span> e as <\/b><\/span><\/span><\/span>capacit\u00e2ncias s\u00e3o diferentes<\/b><\/span><\/span><\/span>, a <\/b><\/span><\/span><\/span>diferen\u00e7a de potencial (tens\u00e3o) tamb\u00e9m ser\u00e1 diferente.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

Voc\u00ea tamb\u00e9m pode <\/b><\/span><\/span><\/span>calcular o capacitor equivalente<\/b><\/span><\/span><\/span> como <\/b><\/span><\/span><\/span>C<\/b><\/span><\/span><\/span>eq <\/b><\/span><\/span><\/sub><\/span>= produto\/soma tomados dois a dois.<\/b><\/span><\/span><\/span><\/p>\n

Lembre-se de que o <\/b><\/span><\/span><\/span>C<\/b><\/span><\/span><\/span>eq<\/b><\/span><\/span><\/sub><\/span>\u00a0\u00e9 sempre menor que a capacit\u00e2ncia de cada um dos capacitores associados.<\/b><\/span><\/span><\/span><\/p>\n

Associa\u00e7\u00e3o paralelo\u00a0de capacitores<\/b><\/span><\/span><\/span><\/p>\n

\u00a0\"\"<\/span><\/p>\n

\"\"<\/p>\n

C\u00e1lculo do capacitor equivalente numa associa\u00e7\u00e3o mista de capacitores<\/b><\/span><\/span><\/span><\/p>\n

Numa <\/b><\/span><\/span><\/span>associa\u00e7\u00e3o mista <\/b><\/span><\/span><\/span>o c\u00e1lculo do capacitor equivalente \u00e9\u00a0<\/b><\/span><\/span><\/span>resolvido por etapas<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>substituindo<\/b><\/span><\/span><\/span> os capacitores que est\u00e3o em <\/b><\/span><\/span><\/span>paralelo pelos equivalentes<\/b><\/span><\/span><\/span>, fazendo o <\/b><\/span><\/span><\/span>mesmo <\/b><\/span><\/span><\/span>com os que est\u00e3o em <\/b><\/span><\/span><\/span>s\u00e9rie e assim procedendo at\u00e9 chegar a um \u00fanico capacitor equivalente final.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

Circuitos com capacitores<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0Lembre-se de que quando <\/b><\/span><\/span><\/span>um capacitor est\u00e1 ligado em um circuito el\u00e9trico e j\u00e1 estiver carregado,<\/b><\/span><\/span><\/span> <\/b>por ele j\u00e1 n\u00e3o passa mais corrente el\u00e9trica <\/b><\/span><\/span><\/span>e, <\/b><\/span><\/span><\/span>basta retirar o ramo onde ele est\u00e1 inserido e resolver o circuito.<\/b><\/span><\/span><\/span><\/p>\n

Preste muita aten\u00e7\u00e3o nesses dois exerc\u00edcios exemplos:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

(01) Correta \"\" Depois que o capacitor est\u00e1 carregado n\u00e3o passa mais corrente no ramo onde ele est\u00e1 inserido.<\/b><\/span><\/span><\/span><\/p>\n

(02) Falsa \"\"<\/b><\/span><\/span><\/span> <\/b>Retirando o ramo onde est\u00e1 o capacitor <\/b><\/span><\/span><\/span>(pois ele est\u00e1 carregado e por ele n\u00e3o circula corrente<\/b><\/span><\/span><\/span>) <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>calculando a resist\u00eancia equivalente \u00a0\"\"<\/b><\/span><\/span><\/span>\u00a0 veja sequ\u00eancia abaixo:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

(3) Falsa \"\"<\/b><\/span><\/span><\/span> Observe a <\/b><\/span><\/span><\/span>sequ\u00eancia abaixo<\/b><\/span><\/span><\/span>, onde voc\u00ea est\u00e1 <\/b><\/span><\/span><\/span>retornando a partir da sequ\u00eancia acima:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

U<\/b><\/span><\/span><\/span>AB <\/b><\/span><\/span><\/sub><\/span>=R.i = 8.3\u00a0 \"\"\u00a0 <\/b><\/span><\/span><\/span>U<\/b><\/span><\/span><\/span>AB <\/b><\/span><\/span><\/sub><\/span>= 24V\u00a0<\/b><\/span><\/span><\/span> \"\"\u00a0 U<\/b><\/span><\/span><\/span>DE<\/b><\/span><\/span><\/sub><\/span>=30.1,2\u00a0 \"\"\u00a0 <\/b><\/span><\/span><\/span>U<\/b><\/span><\/span><\/span>DE <\/b><\/span><\/span><\/sub><\/span>= 36V.<\/b><\/span><\/span><\/span><\/p>\n

(4) Correta \"\" <\/b><\/span><\/span><\/span>P<\/b><\/span><\/span><\/span>30\u2126 <\/b><\/span><\/span><\/sub><\/span>= i\u2019\u2019.U = 1,2.36\u00a0 \"\"\u00a0 <\/b><\/span><\/span><\/span>P<\/b><\/span><\/span><\/span>30\u2126 <\/b><\/span><\/span><\/sub><\/span>= 43,2W\u00a0 \"\"<\/b><\/span><\/span><\/span>\u00a0 P<\/b><\/span><\/span><\/span>20<\/b><\/span><\/span><\/sub><\/span>=i\u2019.U = 1,8.36\u00a0 \"\"\u00a0 <\/b><\/span><\/span><\/span>P<\/b><\/span><\/span><\/span>20\u2126 <\/b><\/span><\/span><\/sub><\/span>= 64,8 W.\u00a0 <\/b><\/span><\/span><\/span>(5) Observe que a <\/b><\/span><\/span><\/span>diferen\u00e7a de potencial nos terminais do capacitor (trecho CF) \u00e9 a mesma que nos trechos BG e DE e vale U=36V (est\u00e3o todos em paralelo)\u00a0 \"\"<\/b><\/span><\/span><\/span>\u00a0 <\/b><\/span><\/span><\/span>C = Q\/U\u00a0 \"\"<\/b><\/span><\/span><\/span>\u00a0 10<\/b><\/span><\/span><\/span>-6 <\/b><\/span><\/span><\/sup><\/span>= Q\/36\u00a0 \"\"\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

Q = 36.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>C.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

02- (UFLA-MG) <\/b><\/span><\/span><\/span>Em quais dos <\/b><\/span><\/span><\/span>circuitos a seguir \u00e9 poss\u00edvel garantir que<\/b><\/span><\/span><\/span>, transcorrido um <\/b><\/span><\/span><\/span>intervalo de tempo muito longo ap\u00f3s fechar a chave S<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>todas as l\u00e2mpadas estar\u00e3o acesas? <\/b><\/span><\/span><\/span>Suponha que a <\/b><\/span><\/span><\/span>bateria satisfa\u00e7a as condi\u00e7\u00f5es necess\u00e1rias para que as l\u00e2mpadas fiquem acesas e n\u00e3o se queimem<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

\"\"a) <\/b><\/span><\/span><\/span>I, II, III.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span>I, V, VI.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span>II, IV, VI.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>d) <\/b><\/span><\/span><\/span>III, IV, VI.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>e) <\/b><\/span><\/span><\/span>IV, V, VI.<\/b><\/span><\/span><\/span><\/p>\n

Lembre-se de que, <\/b><\/span><\/span><\/span>depois que o capacitor est\u00e1 carregado, ele interrompe o circuito e n\u00e3o passa corrente por ele e nem no trecho onde ele est\u00e1 inserido (veja figuras abaixo)<\/b><\/span><\/span><\/span><\/p>\n

<\/a> \"\"\u00a0\u00a0 <\/span>R- D<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

Confira os exerc\u00edcios<\/span><\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

Capacitores (Condensadores) Capacitor ou condensador\u00a0 Capacitor ou condensador\u00a0\u00e9 um dispositivo el\u00e9trico que tem por fun\u00e7\u00e3o armazenar cargas el\u00e9tricas e, como consequ\u00eancia, energia potencial el\u00e9trica. Existem diversos tipos de capacitores (cil\u00edndricos, esf\u00e9ricos ou planos), mas todos s\u00e3o representados por duas placas paralelas,\u00a0condutoras e id\u00eanticas, bem pr\u00f3ximas uma da outra e com um\u00a0isolante\u00a0chamado diel\u00e9trico\u00a0entre elas. Essas\u00a0placas s\u00e3o\u00a0denominadas\u00a0armaduras do capacitor\u00a0e o diel\u00e9trico (isolante)<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1676,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1880","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=1880"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1880\/revisions"}],"predecessor-version":[{"id":1886,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1880\/revisions\/1886"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1676"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=1880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}