{"id":4428,"date":"2019-04-22T01:00:45","date_gmt":"2019-04-22T01:00:45","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4428"},"modified":"2024-07-11T12:18:20","modified_gmt":"2024-07-11T12:18:20","slug":"ufam-am-2019","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2019\/ufam-am-2019\/","title":{"rendered":"UFAM-AM-2019"},"content":{"rendered":"

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\"UFAM\"<\/h3>\n

A\u00a0Universidade Federal do Amazonas\u00a0(UFAM) \u00e9 uma\u00a0institui\u00e7\u00e3o de ensino superior<\/a><\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0p\u00fablica federal<\/a>\u00a0\u00a0brasileira, sendo a maior universidade do\u00a0estado<\/a>\u00a0do\u00a0Amazonas<\/a>\u00a0e uma das principais da\u00a0Regi\u00e3o Norte<\/a>\u00a0do\u00a0<\/b><\/span><\/span><\/span>Brasil<\/b><\/span><\/span><\/span><\/a>.\u00a0\u00c9 a institui\u00e7\u00e3o de ensino superior, com o status de universidade, mais antiga do Brasil.<\/b><\/span><\/span><\/span><\/p>\n

A institui\u00e7\u00e3o \u00e9 a \u00fanica de car\u00e1ter p\u00fablica federal existente no Amazonas.<\/b><\/span><\/span><\/span><\/p>\n

A Universidade Federal do Amazonas possui, em sua rede de ensino, 109 cursos de gradua\u00e7\u00e3o, 40 de\u00a0<\/b><\/span><\/span><\/span>strictu sensu<\/b><\/i><\/span><\/span><\/span>\u00a0e dezenas no\u00a0<\/b><\/span><\/span><\/span>latu sensu<\/b><\/i><\/span><\/span><\/span>, al\u00e9m de 645 grupos de pesquisa.<\/b><\/span><\/span><\/span><\/p>\n

O Ranking Universit\u00e1rio Folha (RUF) colocou a universidade como a 46\u00aa melhor institui\u00e7\u00e3o de ensino superior do pa\u00eds em 2016.<\/b><\/span><\/span><\/span><\/p>\n

A universidade utiliza 2 formas de ingresso no ensino superior.<\/b><\/span><\/span><\/span><\/p>\n

Uma delas \u00e9 atrav\u00e9s do Processo Seletivo Cont\u00ednuo (PSC), vestibular seriado, criado no final da d\u00e9cada de 1990, atrav\u00e9s da Resolu\u00e7\u00e3o 18\/98 do Conselho de Ensino e Pesquisa (CONSEPE), exclusivo para alunos das 3 s\u00e9ries do ensino m\u00e9dio das escolas reconhecidas e registradas no estado do\u00a0<\/b><\/span><\/span><\/span>Amazonas<\/b><\/span><\/span><\/span><\/a>, que seleciona os candidatos que obtiveram melhor pontua\u00e7\u00e3o ao longo dos tr\u00eas anos do processo, sendo respons\u00e1vel pelo preenchimento de 50\u00a0% das vagas da universidade, tanto do campus da capital quanto dos campus do interior do estado. Outra forma de ingresso na UFAM \u00e9 atrav\u00e9s do\u00a0<\/b><\/span><\/span><\/span>Sistema de Sele\u00e7\u00e3o Unificada (SiSU)<\/b><\/span><\/span><\/span><\/a>, que utiliza as notas do\u00a0Exame Nacional do Ensino M\u00e9dio (ENEM)<\/a>\u00a0para o preenchimento dos outros 50% das vagas da universidade.<\/b><\/span><\/span><\/span><\/p>\n

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PROCESSO SELETIVO CONT\u00cdNUO \u2013 PSC 2019 \u2013 1<\/b><\/span><\/span><\/span>a<\/b><\/span><\/span><\/sup><\/span> Etapa<\/b><\/span><\/span><\/span><\/p>\n

Nas <\/b><\/span><\/span><\/span>quest\u00f5es <\/b><\/span><\/span><\/span>em que for <\/b><\/span><\/span><\/span>necess\u00e1rio<\/b><\/span><\/span><\/span> o uso da <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o da gravidade, adote g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Quando <\/b><\/span><\/span><\/span>necess\u00e1rio, adote os valores: <\/b><\/span><\/span><\/span> = 3; <\/b><\/span><\/span><\/span>sen30\u00b0 = cos60\u00b0 <\/b><\/span><\/span><\/span>= 0,50; <\/b><\/span><\/span><\/span>sen60\u00b0 = cos30\u00b0 <\/b><\/span><\/span><\/span>= 0,87; <\/b><\/span><\/span><\/span>sen45\u00b0 = cos45\u00b0<\/b><\/span><\/span><\/span> = 0,71; <\/b><\/span><\/span><\/span>Raio da Terra <\/b><\/span><\/span><\/span>= 6,0 \u00d7 10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span> m e <\/b><\/span><\/span><\/span>Massa da Terra <\/b><\/span><\/span><\/span>= 6,0 \u00d7 10<\/b><\/span><\/span><\/span>24<\/b><\/span><\/span><\/sup><\/span> kg.<\/b><\/span><\/span><\/span><\/p>\n

01-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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O <\/b><\/span><\/span><\/span>pai de Jo\u00e3o o leva de carro at\u00e9 a escola, <\/b><\/span><\/span><\/span>sempre <\/b><\/span><\/span><\/span>respeitando<\/b><\/span><\/span><\/span> as <\/b><\/span><\/span><\/span>leis de tr\u00e2nsito. <\/b><\/span><\/span><\/span>Quando Jo\u00e3o ingressou no ensino m\u00e9dio e come\u00e7ou a ter <\/b><\/span><\/span><\/span>aulas de F\u00edsica, afirmou, <\/b><\/span><\/span><\/span>numa discuss\u00e3o com o pai, <\/b><\/span><\/span><\/span>que se a velocidade m\u00e9dia do carro fosse tr\u00eas vezes maior, eles chegariam ao destino tr\u00eas vezes mais r\u00e1pido. <\/b><\/span><\/span><\/span><\/p>\n

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Para <\/b><\/span><\/span><\/span>testar se o filho est\u00e1 correto, o pai foi com o carro para uma pista controlada <\/b><\/span><\/span><\/span>e realizou os <\/b><\/span><\/span><\/span>seguintes testes: <\/b><\/span><\/span><\/span><\/p>\n

(1)<\/b><\/span><\/span><\/span> com o <\/b><\/span><\/span><\/span>carro em movimento retil\u00edneo e uniforme, partiu do ponto A e chegou ao ponto B \u00e0s 11h30min.<\/b><\/span><\/span><\/span><\/p>\n

(2) <\/b><\/span><\/span><\/span>ainda em <\/b><\/span><\/span><\/span>movimento retil\u00edneo e uniforme e ajustando o hor\u00e1rio para a situa\u00e7\u00e3o anterior, triplicou a velocidade do carro e, partindo do ponto A, chegou ao ponto B \u00e0s 09h30min.<\/b><\/span><\/span><\/span><\/p>\n

Sejam as afirmativas: <\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span> O carro <\/b><\/span><\/span><\/span>saiu do ponto A as 8h30min.<\/b><\/span><\/span><\/span><\/p>\n

II. Partindo do ponto A na velocidade de 11m\/s e, depois, na velocidade de 33m\/s, <\/b><\/span><\/span><\/span>\u00e9 poss\u00edvel concluir que a <\/b><\/span><\/span><\/span>dist\u00e2ncia entre os pontos A e B \u00e9 de 118,8 km.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

III<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span><\/span>velocidade em ambos os casos n\u00e3o foi constante. <\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span><\/span>alternativa correta: <\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>Somente a afirmativa I est\u00e1 correta. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>Somente a afirmativa II est\u00e1 correta. <\/b><\/span><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>Somente a afirmativa III est\u00e1 correta. <\/b><\/span><\/span><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>Somente as afirmativas I e II est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>Todas as afirmativas est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

02-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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03-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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04-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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PROCESSO SELETIVO CONT\u00cdNUO \u2013 PSC 2019 \u2013 2<\/b><\/span><\/span><\/span>a<\/b><\/span><\/span><\/sup><\/span> Etapa<\/b><\/span><\/span><\/span><\/p>\n

Quando necess\u00e1rio <\/b><\/span><\/span><\/span>o uso da <\/b><\/span><\/span><\/span>velocidade do som no ar, adote<\/b><\/span><\/span><\/span> o valor de <\/b><\/span><\/span><\/span>340<\/b><\/span><\/span><\/span> m\/s<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

05-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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06-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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07-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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Dois oper\u00e1rios de uma sider\u00fargica se postam, um em cada extremidade, diante de um trilho de a\u00e7o com 170 <\/b><\/span><\/span><\/span>m<\/b><\/span><\/span><\/span> de comprimento. <\/b><\/span><\/span><\/span><\/p>\n

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Um deles bate com um martelo numa das extremidades do trilho<\/b><\/span><\/span><\/span>, enquanto o <\/b><\/span><\/span><\/span>outro ouve dois sons da pancada,<\/b><\/span><\/span><\/span> com um <\/b><\/span><\/span><\/span>intervalo de (7\u204415) <\/b><\/span><\/span><\/span>s<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span><\/span>partir dessas informa\u00e7\u00f5es, podemos afirmar <\/b><\/span><\/span><\/span>que a <\/b><\/span><\/span><\/span>velocidade do som no trilho de a\u00e7o <\/b><\/span><\/span><\/span>\u00e9 de:<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>364 <\/b><\/span><\/span><\/span>m\/s <\/b><\/span><\/span><\/span> <\/b>b) <\/b><\/span><\/span><\/span>1700 <\/b><\/span><\/span><\/span>m\/s <\/b><\/span><\/span><\/span> <\/b>c) <\/b><\/span><\/span><\/span>3100 <\/b><\/span><\/span><\/span>m\/s <\/b><\/span><\/span><\/span> <\/b>d) <\/b><\/span><\/span><\/span>3400 <\/b><\/span><\/span><\/span>m\/s<\/b><\/span><\/span><\/span> <\/b>e) <\/b><\/span><\/span><\/span>5100 <\/b><\/span><\/span><\/span>m\/s<\/b><\/span><\/span><\/span><\/p>\n

08-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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Numa <\/b><\/span><\/span><\/span>brincadeira que parece m\u00e1gica,<\/b><\/span><\/span><\/span> uma <\/b><\/span><\/span><\/span>moeda \u00e9 colocada no centro do fundo de um recipiente de pl\u00e1stico, n\u00e3o transparente, vazio<\/b><\/span><\/span><\/span> e que se <\/b><\/span><\/span><\/span>encontra sobre uma mesa.<\/b><\/span><\/span><\/span><\/p>\n

Inicialmente, um <\/b><\/span><\/span><\/span>observador sentado consegue ver a moeda. Sem que o observador mexa com a<\/b><\/span><\/span><\/span><\/p>\n

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cabe\u00e7a e a dire\u00e7\u00e3o de seus olhos,<\/b><\/span><\/span><\/span> o <\/b><\/span><\/span><\/span>recipiente \u00e9 afastado at\u00e9 que a moeda deixa de ser vista<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

A seguir, <\/b><\/span><\/span><\/span>com cuidado para n\u00e3o mover a moeda, coloca-se \u00e1gua no recipiente <\/b><\/span><\/span><\/span>e <\/b><\/span><\/span><\/span>o observador volta a ver a moeda. <\/b><\/span><\/span><\/span><\/p>\n

Na <\/b><\/span><\/span><\/span>realidade,<\/b><\/span><\/span><\/span> o que o <\/b><\/span><\/span><\/span>observador v\u00ea \u00e9 a imagem: <\/b><\/span><\/span><\/span><\/p>\n

a) virtual, acima da posi\u00e7\u00e3o da moeda<\/b><\/span><\/span><\/span>, formada pela <\/b><\/span><\/span><\/span>refra\u00e7\u00e3o<\/b><\/span><\/span><\/span> dos raios luminosos que partem da moeda. <\/b><\/span><\/span><\/span><\/p>\n

b) real, acima da posi\u00e7\u00e3o da moeda, <\/b><\/span><\/span><\/span>formada pela <\/b><\/span><\/span><\/span>refra\u00e7\u00e3o <\/b><\/span><\/span><\/span>dos raios luminosos que partem da moeda. <\/b><\/span><\/span><\/span><\/p>\n

c) virtual, acima da posi\u00e7\u00e3o da moeda,<\/b><\/span><\/span><\/span> formada pela <\/b><\/span><\/span><\/span>reflex\u00e3o<\/b><\/span><\/span><\/span> dos raios luminosos que partem da moeda. <\/b><\/span><\/span><\/span><\/p>\n

d) real, acima da posi\u00e7\u00e3o da moeda, <\/b><\/span><\/span><\/span>formada pela <\/b><\/span><\/span><\/span>reflex\u00e3o <\/b><\/span><\/span><\/span>dos raios luminosos que partem da moeda.<\/b><\/span><\/span><\/span><\/p>\n

e) virtual, ao lado da moeda<\/b><\/span><\/span><\/span>, formada pela <\/b><\/span><\/span><\/span>difra\u00e7\u00e3o<\/b><\/span><\/span><\/span> dos raios luminosos que partem da moeda.<\/b><\/span><\/span><\/span><\/p>\n

PROCESSO SELETIVO CONT\u00cdNUO \u2013 PSC 2019 \u2013 3<\/b><\/span><\/span><\/span>a<\/b><\/span><\/span><\/sup><\/span> Etapa<\/b><\/span><\/span><\/span><\/p>\n

Nas quest\u00f5es em que <\/b><\/span><\/span><\/span>for necess\u00e1rio o uso da acelera\u00e7\u00e3o da gravidade, adote <\/b><\/span><\/span><\/span><\/p>\n

g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Quando <\/b><\/span><\/span><\/span>necess\u00e1rio, <\/b><\/span><\/span><\/span>utilize os seguintes valores <\/b><\/span><\/span><\/span>para a \u00e1gua: = 1,0.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> e <\/b><\/span><\/span><\/span><\/p>\n

c = 1,0 cal\/g<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

09-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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S\u00e3o <\/b><\/span><\/span><\/span>tr\u00eas os processos de eletriza\u00e7\u00e3o<\/b><\/span><\/span><\/span>: <\/b><\/span><\/span>por <\/b><\/span><\/span><\/span>atrito<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span> por <\/b><\/span><\/span><\/span>contato<\/b><\/span><\/span><\/span> e por <\/b><\/span><\/span><\/span>indu\u00e7\u00e3o.<\/b><\/span><\/span><\/span> Considere as <\/b><\/span><\/span><\/span>seguintes afirmativas: <\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span> <\/b>Na <\/b><\/span><\/span><\/span>eletriza\u00e7\u00e3o por atrito, al\u00e9m de adquirirem cargas el\u00e9tricas de sinais opostos, <\/b><\/span><\/span><\/span>os corpos apresentam <\/b><\/span><\/span><\/span>quantidades de cargas el\u00e9tricas de mesmo valor absoluto. <\/b><\/span><\/span><\/span><\/p>\n

II.<\/b><\/span><\/span><\/span> <\/b>Na <\/b><\/span><\/span><\/span>eletriza\u00e7\u00e3o por atrito, <\/b><\/span><\/span><\/span>as subst\u00e2ncias podem <\/b><\/span><\/span><\/span>ser distribu\u00eddas numa sequ\u00eancia, denominada s\u00e9rie triboel\u00e9trica,<\/b><\/span><\/span><\/span> de <\/b><\/span><\/span><\/span>acordo com o sinal da carga que adquirem ao serem atritadas umas com as outras.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

III.<\/b><\/span><\/span><\/span> Tanto nos processo de eletriza\u00e7\u00e3o por contato, quanto no processo de eletriza\u00e7\u00e3o por indu\u00e7\u00e3o, um dos corpos deve, inicialmente, estar carregado eletricamente. <\/b><\/span><\/span><\/span><\/p>\n

IV.<\/b><\/span><\/span><\/span> Tanto nos processo de eletriza\u00e7\u00e3o por contato, quanto no processo de eletriza\u00e7\u00e3o por indu\u00e7\u00e3o, torna-se necess\u00e1rio que um dos corpos seja ligado temporariamente a um aterramento.<\/b><\/span><\/span><\/span><\/p>\n

V.<\/b><\/span><\/span><\/span> <\/b>Nos <\/b><\/span><\/span><\/span>tr\u00eas processos de eletriza\u00e7\u00e3o, torna-se necess\u00e1rio manter, temporariamente, um contato direto entre os corpos. <\/b><\/span><\/span><\/span><\/p>\n

Assinale <\/b><\/span><\/span><\/span>a alternativa correta: <\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>Somente as afirmativas <\/b><\/span><\/span><\/span>I, II e III est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>Somente as afirmativas <\/b><\/span><\/span><\/span>I, III e V est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>Somente as afirmativas <\/b><\/span><\/span><\/span>II, III e IV est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>Somente as afirmativas <\/b><\/span><\/span><\/span>II, III e V est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>Somente as afirmativas <\/b><\/span><\/span><\/span>III, IV e V est\u00e3o corretas<\/b><\/span><\/span><\/span><\/p>\n

10-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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Tr\u00eas condutores <\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span><\/span>C<\/b><\/span><\/span><\/span>, de mesma capacit\u00e2ncia, est\u00e3o inicialmente eletrizados com cargas <\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>, <\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span> e <\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>C<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Considere as <\/b><\/span><\/span><\/span>seguintes afirmativas:<\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span> <\/b>Se os <\/b><\/span><\/span><\/span>tr\u00eas condutores forem colocados em contato, as novas cargas dos condutores s\u00e3o proporcionais ao potencial el\u00e9trico comum. <\/b><\/span><\/span><\/span><\/p>\n

II.<\/b><\/span><\/span><\/span> Ap\u00f3s o contato, <\/b><\/span><\/span><\/span>a nova carga comum dos tr\u00eas condutores \u00e9 a m\u00e9dia aritm\u00e9tica das cargas antes do contato. <\/b><\/span><\/span><\/span><\/p>\n

III. <\/b><\/span><\/span><\/span>Ap\u00f3s o contato, <\/b><\/span><\/span><\/span>o novo potencial el\u00e9trico comum \u00e9 a m\u00e9dia aritm\u00e9tica dos potenciais el\u00e9tricos antes do contato<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

Assinale a alternativa correta: <\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>Somente a afirmativa I est\u00e1 correta. <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>Somente a afirmativa II est\u00e1 correta. <\/b><\/span><\/span><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>Somente as afirmativas I e II est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>Somente as afirmativas II e III est\u00e3o corretas. <\/b><\/span><\/span><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>Todas as afirmativas est\u00e3o corretas<\/b><\/span><\/span><\/span><\/p>\n

11-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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12-(UFAM-AM-2019)<\/span><\/span><\/span><\/p>\n

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Resolu\u00e7\u00e3o Comentada UFAM \u2013 AM \u2013 2019)<\/span><\/span><\/span><\/p>\n

01- <\/span><\/span><\/span><\/p>\n

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R- D<\/b><\/span><\/span><\/span><\/p>\n

02-<\/span><\/span><\/span><\/p>\n

Veja o formul\u00e1rio abaixo<\/span><\/span><\/span><\/p>\n

Corpo abandonado de certa altura h do solo<\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

R- B<\/b><\/span><\/span><\/span><\/p>\n

03-<\/span><\/span><\/span><\/p>\n

Veja a teoria a seguir:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

Sem alternativa \u2013 quest\u00e3o anulada.<\/span><\/span><\/span><\/p>\n

04- <\/span><\/span><\/span><\/span><\/span><\/p>\n

Se voc\u00ea n\u00e3o domina a teoria, ela est\u00e1 a seguir:<\/b><\/span><\/span><\/span><\/span><\/p>\n

Acelera\u00e7\u00e3o da Gravidade<\/b><\/span><\/span><\/span><\/span><\/p>\n

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

<\/p>\n

<\/p>\n

<\/p>\n

R- C<\/b><\/span><\/span><\/span><\/p>\n

05-<\/span><\/span><\/span><\/p>\n

Observe pelo enunciado que a <\/b><\/span><\/span><\/span>subst\u00e2ncia \u00e9 a mesma (alum\u00ednio), mas n\u00e3o fez refer\u00eancia \u00e0s massas, que podem ser diferentes. <\/b><\/span><\/span><\/span><\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>calor espec\u00edfico<\/b><\/span><\/span><\/span>\u00a0depende somente da subst\u00e2ncia, n\u00e3o da quantidade de massa,<\/b><\/span><\/span><\/span> pois ele \u00e9 definido com a quantidade de\u00a0<\/b><\/span><\/span><\/span>calor<\/b><\/span><\/span><\/span>\u00a0necess\u00e1ria para elevar <\/b><\/span><\/span><\/span>uma unidade de massa <\/b><\/span><\/span><\/span>de um grau Celsius (ou Kelvin, ou Fahrenheit). A\u00a0<\/b><\/span><\/span><\/span>capacidade t\u00e9rmica<\/b><\/span><\/span><\/span>, al\u00e9m de depender do\u00a0<\/b><\/span><\/span><\/span>calor espec\u00edfico<\/b><\/span><\/span><\/span>\u00a0da subst\u00e2ncia, depende da massa do corpo. Portanto trata-se da capacidade t\u00e9rmica.<\/b><\/span><\/span><\/span><\/p>\n

Capacidade t\u00e9rmica (C)<\/b><\/span><\/span><\/span><\/p>\n

\u00a0Define-se\u00a0<\/b><\/span><\/span><\/span>capacidade t\u00e9rmica (C) ou capacidade calor\u00edfica\u00a0<\/b><\/span><\/span><\/span>de um corpo como sendo o\u00a0<\/b><\/span><\/span><\/span>produto da massa desse corpo pelo calor espec\u00edfico da subst\u00e2ncia de que ele \u00e9 constitu\u00eddo, ou seja\u00a0\u00a0<\/b><\/span><\/span><\/span>\u00a0\u00a0 C = m.c\u00a0\u00a0<\/b><\/span><\/span><\/span>\u00a0 como Q = m.c.\u0394\u03b8\u00a0\u00a0<\/b><\/span><\/span><\/span>\u00a0\u00a0<\/b><\/span><\/span><\/span>Q = C.\u0394\u03b8\u00a0\u00a0<\/b><\/span><\/span><\/span>\u00a0 ou\u00a0<\/b><\/span><\/span><\/span>Q = C.(\u03b8 \u2013 \u03b8o).<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

R \u2013 B<\/b><\/span><\/span><\/span><\/p>\n

06-<\/b><\/span><\/span><\/span><\/p>\n

Rendimento de uma m\u00e1quina t\u00e9rmica de Carnot:<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

\u03b7 = 1 – <\/b><\/span><\/span><\/span> = <\/b><\/span><\/span>1 – = 1 \u2013 0,2 \u03b7 = 0,8 <\/b><\/span><\/span><\/span> <\/b>\u03b7 = 80%.<\/b><\/span><\/span><\/span><\/p>\n

R- D<\/span><\/span><\/span><\/p>\n

07-<\/span><\/span><\/span><\/p>\n

<\/p>\n

R- E<\/span><\/span><\/span><\/p>\n

08-<\/span><\/span><\/span><\/p>\n

Trata-se de um dioptro plano e, se voc\u00ea n\u00e3o conhece a teoria ela est\u00e1 a seguir:<\/b><\/span><\/span><\/span><\/p>\n

Na\u00a0<\/b><\/span><\/span><\/span>figura 1<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>o\u00a0<\/b><\/span><\/span><\/span>ponto <\/b><\/span><\/span><\/span>objeto real P<\/b><\/span><\/span><\/span>\u00a0est\u00e1 dentro\u00a0<\/b><\/span><\/span><\/span>da \u00e1gua (mais refringente, maior \u00edndice de refra\u00e7\u00e3o) e emitindo dois raios de luz<\/b><\/span><\/span><\/span>, um\u00a0<\/b><\/span><\/span><\/span>vertical que<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>n\u00e3o sofre desvio<\/b><\/span><\/span><\/span>\u00a0e o outro\u00a0<\/b><\/span><\/span><\/span>obl\u00edquo que, ao se refratar para o ar, afasta-se da normal atingindo<\/b><\/span><\/span><\/span>\u00a0os\u00a0<\/b><\/span><\/span><\/span>olhos do observador<\/b><\/span><\/span><\/span>\u00a0e determina a\u00a0<\/b><\/span><\/span><\/span>imagem virtual<\/b><\/span><\/span><\/span> <\/b>(P\u2019), <\/b><\/span><\/span><\/span>obtida\u00a0<\/b><\/span><\/span><\/span>no\u00a0<\/b><\/span><\/span><\/span>prolongamento desse raio<\/b><\/span><\/span><\/span>\u00a0e onde ele\u00a0<\/b><\/span><\/span><\/span>intercepta o raio de luz vertical, <\/b><\/span><\/span><\/span>fornecendo essa imagem P\u2019,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>acima do objeto real P.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

\u00a0Na\u00a0<\/b><\/span><\/span><\/span>figura II<\/b><\/span><\/span><\/span>\u00a0o\u00a0<\/b><\/span><\/span><\/span>ponto objeto real<\/b><\/span><\/span><\/span> P est\u00e1 no ar (menos refringente, menor \u00edndice de refra\u00e7\u00e3o)<\/b><\/span><\/span><\/span>\u00a0e emitindo\u00a0<\/b><\/span><\/span><\/span>dois raios de luz, um vertical que n\u00e3o sofre <\/b><\/span><\/span><\/span>desvio e o\u00a0<\/b><\/span><\/span><\/span>outro obl\u00edquo que, ao refratar-se para\u00a0 a \u00e1gua aproxima-se da normal<\/b><\/span><\/span><\/span>\u00a0atingindo os\u00a0<\/b><\/span><\/span><\/span>olhos do observador e determina a <\/b><\/span><\/span><\/span>imagem virtual P\u2019, acima do objeto real P.<\/b><\/span><\/span><\/span><\/p>\n

Observe que,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>em ambos os casos a imagem est\u00e1 sempre acima do objeto.<\/b><\/span><\/span><\/span><\/p>\n

Como utilizar a equa\u00e7\u00e3o do dioptro-plano<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Sendo:<\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>dist\u00e2ncia vertical da imagem \u00e0 superf\u00edcie de separa\u00e7\u00e3o<\/b><\/span><\/span><\/span>\u00a0dos meios A e B\u00a0<\/b><\/span><\/span><\/span>(dist\u00e2ncia aparente, em que o observador enxerga a imagem)<\/b><\/span><\/span><\/span><\/p>\n

d<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>dist\u00e2ncia vertical do objeto, at\u00e9 a superf\u00edcie de separa\u00e7\u00e3o\u00a0<\/b><\/span><\/span><\/span>dos meios A e B.<\/b><\/span><\/span><\/span><\/p>\n

n<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00edndice de refra\u00e7\u00e3o do meio onde est\u00e1 o observador\u00a0<\/b><\/span><\/span><\/span>(no caso, meio A)<\/b><\/span><\/span><\/span><\/p>\n

n<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00edndice de refra\u00e7\u00e3o do meio onde est\u00e1 o objeto e a imagem<\/b><\/span><\/span><\/span>\u00a0(no caso, meio B)<\/b><\/span><\/span><\/span><\/p>\n

O caso do exerc\u00edcio \u00e9 o da figura 1 acima, onde a ave \u00e9 a pessoa e o peixe a moeda, que na \u00e1gua possui imagem <\/b><\/span><\/span><\/span>virtual, acima da posi\u00e7\u00e3o da moeda<\/b><\/span><\/span><\/span>, formada pela <\/b><\/span><\/span><\/span>refra\u00e7\u00e3o<\/b><\/span><\/span><\/span> dos raios luminosos que partem da moeda. <\/b><\/span><\/span><\/span><\/p>\n

R- A<\/b><\/span><\/span><\/span><\/p>\n

09-<\/b><\/span><\/span><\/span><\/p>\n

Se voc\u00ea n\u00e3o domina a teoria, ela \u00e9 extensa e est\u00e1 a seguir:<\/b><\/span><\/span><\/span><\/p>\n

Eletriza\u00e7\u00e3o por atrito<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Para que ocorra\u00a0<\/b><\/span><\/span><\/span>eletriza\u00e7\u00e3o por atrito<\/b><\/span><\/span><\/span>\u00a0os\u00a0<\/b><\/span><\/span><\/span>corpos atritados<\/b><\/span><\/span><\/span>\u00a0devem ser de\u00a0<\/b><\/span><\/span><\/span>materiais diferentes<\/b><\/span><\/span><\/span>\u00a0e a distribui\u00e7\u00e3o de cargas obedece \u00e0 s\u00e9rie\u00a0<\/b><\/span><\/span><\/span>triboel\u00e9trica abaixo (fornecida).<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Atritando\u00a0<\/b><\/span><\/span><\/span>quaisquer materiais dessa s\u00e9rie<\/b><\/span><\/span><\/span>, o que\u00a0<\/b><\/span><\/span><\/span>estiver \u00e0 esquerda ficar\u00e1 com carga positiva e o da direita, negativa.<\/b><\/span><\/span><\/span><\/p>\n


\n<\/b><\/span><\/span><\/span>Eletriza\u00e7\u00e3o por contato<\/b><\/span><\/span><\/span><\/p>\n

Pode ocorrer<\/b><\/span><\/span><\/span>\u00a0entre\u00a0<\/b><\/span><\/span><\/span>dois condutores<\/b><\/span><\/span><\/span>\u00a0(cargas el\u00e9tricas se distribuem em suas superf\u00edcies externas) ou entre um\u00a0<\/b><\/span><\/span><\/span>condutor e um isolante<\/b><\/span><\/span><\/span>\u00a0(no isolante as cargas el\u00e9tricas ficam somente no local do contato).<\/b><\/span><\/span><\/span><\/p>\n

Considere\u00a0<\/b><\/span><\/span><\/span>um condutor A eletrizado com carga positiva (Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0= + Q)<\/b><\/span><\/span><\/span>\u00a0e outro <\/b><\/span><\/span><\/span>condutor B,
\n<\/b><\/span><\/span><\/span>eletricamente\u00a0<\/b><\/span><\/span><\/span>neutro<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>(Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u00a0= 0)<\/b><\/span><\/span><\/span>\u00a0presos a\u00a0<\/b><\/span><\/span><\/span>suportes isolantes<\/b><\/span><\/span><\/span>\u00a0(para que n\u00e3o descarreguem, <\/b><\/span><\/span><\/span>inicialmente<\/b><\/span><\/span><\/span><\/p>\n

separados.<\/b><\/span><\/span><\/span><\/p>\n

Quando s\u00e3o\u00a0<\/b><\/span><\/span><\/span>colocados em contato<\/b><\/span><\/span><\/span>, os dois se comportam como se fossem <\/b><\/span><\/span><\/span>um \u00fanico corpo e haver\u00e1 uma distribui\u00e7\u00e3o de cargas nas superf\u00edcies de A e de B.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Ap\u00f3s essa distribui\u00e7\u00e3o de cargas\u00a0<\/b><\/span><\/span><\/span>s\u00e3o separados e A ficar\u00e1 com carga Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u2019\u00a0e B com carga Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u2019<\/b><\/span><\/span><\/span>, tal que\u00a0<\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u2019\u00a0+ Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u2019 = + Q (princ\u00edpio da conserva\u00e7\u00e3o das cargas el\u00e9tricas).<\/b><\/span><\/span><\/span><\/p>\n

Observe que, se\u00a0<\/b><\/span><\/span><\/span>os\u00a0condutores forem id\u00eanticos<\/b><\/span><\/span><\/span>\u00a0e com as\u00a0<\/b><\/span><\/span><\/span>mesmas dimens\u00f5es<\/b><\/span><\/span><\/span>, voc\u00ea teria\u00a0<\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u2019 = Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u2019= Q\u2019\u00a0<\/b><\/span><\/span><\/span>\u00a0Q\u2019 + Q\u2019 = + Q\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Q\u2019= Q\/2<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Se os dois corpos\u00a0<\/b><\/span><\/span><\/span>forem\u00a0id\u00eanticos<\/b><\/span><\/span><\/span>\u00a0e estiverem\u00a0<\/b><\/span><\/span><\/span>inicialmente eletrizados com cargas\u00a0Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0e Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>ap\u00f3s\u00a0<\/b><\/span><\/span><\/span>o contato eles ter\u00e3o cargas id\u00eanticas Q\u2019 tal que\u00a0<\/b><\/span><\/span><\/span>Q\u2019= (Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0+ Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>)\/2.<\/b><\/span><\/span><\/span><\/p>\n

Exemplos:<\/b><\/span><\/span><\/span><\/p>\n

Em todos os casos a seguir as\u00a0<\/b><\/span><\/span><\/span>esferas s\u00e3o id\u00eanticas,<\/b><\/span><\/span><\/span>\u00a0e\u00a0<\/b><\/span><\/span><\/span>depois de colocadas em contato s\u00e3o separadas e cada uma delas ficar\u00e1 com carga Q\u2019:<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>QA\u00a0= 0 e QB= \u2013 8\u03bcC<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0Q\u2019 = (QA\u00a0+ QB)\/2 = (0 \u2013 8\u03bc)\/2\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Q\u2019= \u2013 4\u03bcC (carga de cada uma ap\u00f3s o contato)<\/b><\/span><\/span><\/span><\/p>\n

b) QA= 2C e QB= \u2013 6C<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0Q\u2019 = (QA\u00a0+ QB)\/2 = (2 \u2013 6)\/2\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Q\u2019 = -2C (carga de cada uma ap\u00f3s o contato)<\/b><\/span><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>QA\u00a0= 6\u03bcC, QB\u00a0= -8 \u03bcC e QC= 12 \u03bcC\u00a0<\/b><\/span><\/span><\/span>\u00a0Q\u2019 = (QA\u00a0+ QB\u00a0+ QC)\/3=(6 \u03bc \u2013 8 \u03bc + 12 \u03bc)\/3\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Q\u2019= (10\/3) \u03bcC.<\/b><\/span><\/span><\/span><\/p>\n


\n<\/b><\/span><\/span><\/span>Eletriza\u00e7\u00e3o por indu\u00e7\u00e3o<\/b><\/span><\/span><\/span><\/p>\n

Induzir eletricamente<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>significa provocar\u00a0<\/b><\/span><\/span><\/span>uma separa\u00e7\u00e3o de cargas, sem que haja contato. Observe dois processos:<\/b><\/span><\/span><\/span><\/p>\n

Primeiro processo<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Considere duas esferas condutoras, inicialmente descarregadas (neutras)<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>e encostadas uma na outra (figura 1).\u00a0<\/b><\/span><\/span><\/span>Aproxima-se, sem encostar,<\/b><\/span><\/span><\/span>\u00a0uma\u00a0<\/b><\/span><\/span><\/span>terceira\u00a0<\/b><\/span><\/span><\/span>esfera <\/b><\/span><\/span><\/span> <\/p>\n

condutora\u00a0<\/b><\/span><\/span><\/span>eletrizada. <\/b><\/span><\/span><\/span><\/p>\n

A\u00a0<\/b><\/span><\/span><\/span>esfera eletrizada<\/b><\/span><\/span><\/span>\u00a0provoca uma\u00a0<\/b><\/span><\/span><\/span>indu\u00e7\u00e3o el\u00e9trica (movimenta\u00e7\u00e3o de cargas) nas outras duas at\u00e9 que elas apresentem a distribui\u00e7\u00e3o indicada na figura 3.<\/b><\/span><\/span><\/span><\/p>\n

Em seguida,\u00a0<\/b><\/span><\/span><\/span>sem tirar do lugar a esfera eletrizada,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>afasta-se um pouco uma esfera da outra.<\/b><\/span><\/span><\/span>\u00a0Finalmente,\u00a0<\/b><\/span><\/span><\/span>sem mexer mais nas esferas<\/b><\/span><\/span><\/span>,\u00a0<\/b><\/span><\/span><\/span>remove-se a esfera eletrizada<\/b><\/span><\/span><\/span>, levando-a para\u00a0<\/b><\/span><\/span><\/span>muito longe<\/b><\/span><\/span><\/span>\u00a0das esferas.<\/b><\/span><\/span><\/span><\/p>\n

Nessa\u00a0<\/b><\/span><\/span><\/span>situa\u00e7\u00e3o final, as<\/b><\/span><\/span><\/span>\u00a0cargas se\u00a0<\/b><\/span><\/span><\/span>espalham ficando na superf\u00edcie externa de cada carga, ficando eletrizadas conforme a figura 4.<\/b><\/span><\/span><\/span><\/p>\n

Segundo processo<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Aproxima-se um condutor eletrizado<\/b><\/span><\/span><\/span>, por exemplo, <\/b><\/span><\/span><\/span>negativamente<\/b><\/span><\/span><\/span>\u00a0(indutor) de um\u00a0<\/b><\/span><\/span><\/span>condutor neutro que se deseja eletrizar (induzido), sem encostar, mas bem pr\u00f3ximos (figura 1).<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Os\u00a0<\/b><\/span><\/span><\/span>el\u00e9trons livres do indutor<\/b><\/span><\/span><\/span>\u00a0ser\u00e3o\u00a0<\/b><\/span><\/span><\/span>repelidos,<\/b><\/span><\/span><\/span>\u00a0ficando\u00a0<\/b><\/span><\/span><\/span>o lado direito do induzido com excesso de el\u00e9trons<\/b><\/span><\/span><\/span>\u00a0e o lado\u00a0<\/b><\/span><\/span><\/span>esquerdo com falta de el\u00e9trons,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>fen\u00f4meno\u00a0<\/b><\/span><\/span><\/span>que recebe o nome de\u00a0<\/b><\/span><\/span><\/span>indu\u00e7\u00e3o el\u00e9trica\u00a0(figura 2).<\/b><\/span><\/span><\/span><\/p>\n

As\u00a0<\/b><\/span><\/span><\/span>cargas el\u00e9tricas<\/b><\/span><\/span><\/span>\u00a0que se concentram nas\u00a0<\/b><\/span><\/span><\/span>duas extremidades opostas <\/b><\/span><\/span><\/span>(denominadas\u00a0cargas induzidas) s\u00e3o de\u00a0<\/b><\/span><\/span><\/span>mesmo m\u00f3dulo, mas de sinais opostos<\/b><\/span><\/span><\/span>\u00a0e, por esse motivo o\u00a0<\/b><\/span><\/span><\/span>induzido continua neutro.<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span><\/p>\n

Em seguida,\u00a0<\/b><\/span><\/span><\/span>ainda na presen\u00e7a do indutor<\/b><\/span><\/span><\/span>\u00a0voc\u00ea liga\u00a0<\/b><\/span><\/span><\/span>o induzido \u00e0 terra\u00a0<\/b><\/span><\/span><\/span>(fio terra ou com seu dedo) e\u00a0<\/b><\/span><\/span><\/span>observa que el\u00e9trons se deslocam do induzido para a terra (figura 3).<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Se o\u00a0<\/b><\/span><\/span><\/span>indutor tivesse cargas positivas<\/b><\/span><\/span><\/span>, ao\u00a0<\/b><\/span><\/span><\/span>final de todo o processo o induzido ficaria eletrizado com cargas negativas.<\/b><\/span><\/span><\/span><\/p>\n

R- A<\/b><\/span><\/span><\/span><\/p>\n

10-<\/span><\/span><\/span><\/p>\n

I. Correta – <\/b><\/span><\/span><\/span><\/p>\n

Equil\u00edbrio eletrost\u00e1tico entre dois condutores<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00a0sejam\u00a0<\/b><\/span><\/span><\/span>dois condutores esf\u00e9ricos A e B,<\/b><\/span><\/span><\/span>\u00a0de\u00a0<\/b><\/span><\/span><\/span>raios R<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0e R<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u00a0respectivamente, com\u00a0<\/b><\/span><\/span><\/span>cargas el\u00e9tricas Q<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0e Q<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u00a0e <\/b><\/span><\/span><\/span>potenciais el\u00e9tricos diferentes V<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span>\u00a0e<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>V<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span>\u00a0(fig. I).<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span><\/p>\n

Unindo-os por um fio condutor<\/b><\/span><\/span><\/span>\u00a0ou\u00a0<\/b><\/span><\/span><\/span>encostando-os<\/b><\/span><\/span><\/span>\u00a0haver\u00e1\u00a0<\/b><\/span><\/span><\/span>passagem de cargas el\u00e9tricas entre eles<\/b><\/span><\/span><\/span>\u00a0at\u00e9 que seja\u00a0<\/b><\/span><\/span><\/span>atingido o equil\u00edbrio eletrost\u00e1tico quando atingem o mesmo potencial V (figura III).<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

II. Correta<\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

R- E<\/span><\/span><\/span><\/p>\n

11-<\/span><\/span><\/span><\/p>\n

<\/p>\n

R- E<\/b><\/span><\/span><\/span><\/p>\n

12-<\/span><\/span><\/span><\/p>\n

For\u00e7a magn\u00e9tica sobre carga el\u00e9trica<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

R- C<\/b><\/span><\/span><\/span><\/p>\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":"

  A\u00a0Universidade Federal do Amazonas\u00a0(UFAM) \u00e9 uma\u00a0institui\u00e7\u00e3o de ensino superior\u00a0\u00a0p\u00fablica federal\u00a0\u00a0brasileira, sendo a maior universidade do\u00a0estado\u00a0do\u00a0Amazonas\u00a0e uma das principais da\u00a0Regi\u00e3o Norte\u00a0do\u00a0Brasil.\u00a0\u00c9 a institui\u00e7\u00e3o de ensino superior, com o status de universidade, mais antiga do Brasil. A institui\u00e7\u00e3o \u00e9 a \u00fanica de car\u00e1ter p\u00fablica federal existente no Amazonas. A Universidade Federal do Amazonas possui, em sua rede de ensino, 109 cursos<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":4337,"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-4428","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4428","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=4428"}],"version-history":[{"count":3,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4428\/revisions"}],"predecessor-version":[{"id":10312,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4428\/revisions\/10312"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4337"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=4428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}