{"id":3792,"date":"2018-02-15T10:47:37","date_gmt":"2018-02-15T10:47:37","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=3792"},"modified":"2024-06-26T16:01:46","modified_gmt":"2024-06-26T16:01:46","slug":"eletrodinamica-resistor-equivalente-nas-associacoes-serie-paralelo-e-mista","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/enem\/eletrodinamica-resistor-equivalente-nas-associacoes-serie-paralelo-e-mista\/","title":{"rendered":"Eletrodin\u00e2mica – Resistor Equivalente nas associa\u00e7\u00f5es S\u00e9rie, Paralelo e Mista"},"content":{"rendered":"

Eletrodin\u00e2mica<\/b><\/span><\/span><\/span><\/p>\n

Resistor Equivalente nas associa\u00e7\u00f5es S\u00e9rie, Paralelo e Mista<\/b><\/span><\/span><\/span><\/p>\n

Exerc\u00edcios com caracter\u00edsticas de ENEM<\/b><\/span><\/span><\/span><\/p>\n

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

01-(UFMS-MS)<\/b><\/span><\/span><\/span><\/p>\n

\"Eletrodin\u00e2mica\"<\/p>\n

Resist\u00eancias el\u00e9tricas iguais (cada uma de valor 12 \u03a9) ligam os v\u00e9rtices A,B e C de um tri\u00e2ngulo, conforme a figura.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sobre a resist\u00eancia el\u00e9trica equivalente, \u00e9 correto afirmar que,<\/b><\/span><\/span><\/span><\/p>\n

a) entre os v\u00e9rtices A e B, \u00e9 de 12 \u2126\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

b) entre os v\u00e9rtices B e C, \u00e9 de 8\u2126<\/b><\/span><\/span><\/span><\/p>\n

c) entre os v\u00e9rtices A e C, \u00e9 de 36 \u2126\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

d) entre os v\u00e9rtices A e B, \u00e9 de 24 \u2126<\/b><\/span><\/span><\/span><\/p>\n

e) entre os v\u00e9rtices A e B, \u00e9 de 36 \u2126<\/b><\/span><\/span><\/span><\/p>\n

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

02-(UESPI-PI)\u00a0\u00a0<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A resist\u00eancia equivalente entre os terminais A e B da bateria ideal no circuito el\u00e9trico a seguir \u00e9 igual a:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

03-(MACKENZIE-SP)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A resist\u00eancia el\u00e9trica do resistor equivalente da<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

associa\u00e7\u00e3o abaixo, entre os pontos A e B, \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

04-(PUC-SP)<\/b><\/span><\/span><\/span><\/p>\n

Para o circuito abaixo, considere que todos os resistores s\u00e3o \u00f4hmicos e de resist\u00eancia el\u00e9trica R.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Calcule o valor da resist\u00eancia el\u00e9trica equivalente da associa\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

05-(UF-PE)<\/b><\/span><\/span><\/span><\/p>\n

No circuito, qual a resist\u00eancia equivalente entre os pontos A e B?<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

06-(FGV-SP)<\/b><\/span><\/span><\/span><\/p>\n

Determine a resist\u00eancia do resistor equivalente da associa\u00e7\u00e3o abaixo, entre os pontos x e y:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

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

07-(FUVEST-SP)<\/b><\/span><\/span><\/span><\/p>\n

\u00a0Um material condutor especial se torna luminoso quando \u00e9 percorrido por uma corrente el\u00e9trica. Com esse material foram escritas palavras, e nos terminais 1 e 2 foram ligadas fontes de tens\u00e3o, numa sala escura. A palavra leg\u00edvel \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

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

08-(UFRRJ-RJ)<\/b><\/span><\/span><\/span><\/p>\n

A figura a seguir mostra um circuito simples que alimenta um chuveiro el\u00e9trico C.<\/b><\/span><\/span><\/span><\/p>\n

Dentre os sistemas de resist\u00eancias a seguir, o que aquecer\u00e1 mais rapidamente a \u00e1gua \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

09-\u00a0(UNESP-SP)<\/b><\/span><\/span><\/span><\/p>\n

Como consequ\u00eancia do r\u00e1pido desenvolvimento da tecnologia eletr\u00f4nica, hoje \u00e9 poss\u00edvel realizar experimentos nas diversas \u00e1reas da ci\u00eancia utilizando amostras com dimens\u00f5es da ordem de nm (1 nm = 10<\/b><\/span><\/span><\/span>-9<\/b><\/span><\/span><\/sup><\/span>\u00a0m). Novas perspectivas foram introduzidas e v\u00eam sendo exploradas, como as investiga\u00e7\u00f5es sobre propriedades el\u00e9tricas de macromol\u00e9culas e cadeias polim\u00e9ricas, como as prote\u00ednas.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0Diante dessa possibilidade, um pesquisador verificou com sucesso a sua hip\u00f3tese de que uma determinada prote\u00edna, esticada, satisfazia \u00e0 lei de Ohm. Depois de medidas sistem\u00e1ticas da resist\u00eancia el\u00e9trica, ele concluiu que o seu valor \u00e9 R. Prosseguindo na investiga\u00e7\u00e3o, partiu essa cadeia em dois peda\u00e7os, ligando-os em paralelo, e a medida da resist\u00eancia efetiva foi de 3R\/16. Considerando que o peda\u00e7o de menor comprimento tenha resist\u00eancia R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>\u00a0e o de comprimento maior, resist\u00eancia R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>, calcule esses valores expressos em termos de R.<\/b><\/span><\/span><\/span><\/p>\n

a)\u00a0R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=R\/4 e R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>=3R\/4\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

b) R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=R\/2 e R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>=4R\/3\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

c)\u00a0\u00a0R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=2R e R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>=3R\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

d)\u00a0\u00a0R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=R e R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>=3R\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

e)\u00a0\u00a0R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=R e R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>=0<\/b><\/span><\/span><\/span><\/p>\n

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

10- (CFT-MG)<\/b><\/span><\/span><\/span><\/p>\n

A FIG. 1 representa uma associa\u00e7\u00e3o de resist\u00eancias id\u00eanticas e a FIG. 2, uma bateria e fios de liga\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

liga\u00e7\u00e3o. Para se obter o maior valor de corrente el\u00e9trica, os fios devem ser ligados nos pontos<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

 <\/p>\n

Confira a resolu\u00e7\u00e3o comentada<\/span><\/a>
\n<\/span><\/h3>\n

 <\/p>\n

Clique aqui para ver sobre o tema!<\/a><\/p>\n

Confira as v\u00eddeo aulas!<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Eletrodin\u00e2mica Resistor Equivalente nas associa\u00e7\u00f5es S\u00e9rie, Paralelo e Mista Exerc\u00edcios com caracter\u00edsticas de ENEM \u00a0 01-(UFMS-MS) Resist\u00eancias el\u00e9tricas iguais (cada uma de valor 12 \u03a9) ligam os v\u00e9rtices A,B e C de um tri\u00e2ngulo, conforme a figura. Sobre a resist\u00eancia el\u00e9trica equivalente, \u00e9 correto afirmar que, a) entre os v\u00e9rtices A e B, \u00e9 de 12 \u2126\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b) entre os<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3575,"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-3792","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3792","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=3792"}],"version-history":[{"count":4,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3792\/revisions"}],"predecessor-version":[{"id":9838,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3792\/revisions\/9838"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3575"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=3792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}