Questões do ENEM: Universidade Federal do Paraná (UFPR)

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460 questões encontradas. Mostrando a página 21 de 23.

  • 36D41315-B0

    História

    História Geral
    UFPR · 2011FácilEntre para guardar nos favoritos
    Com base nos estudos sobre as consequências da Primeira Guerra Mundial para a Europa, é correto afirmar:
    Escolha uma alternativa para a questão 36d41315-b0
  • 36D01120-B0

    História

    Conflitos na antiga Europa do Leste
    UFPR · 2011MédioEntre para guardar nos favoritos
    O fim do comunismo na Europa Oriental e na União Soviética, entre 1989 e 1991, foi um fato inesperado para a maioria da comunidade acadêmica e política, pois ele não apresentava sinais aparentes de deterioração. O historiador Mark Mazower declarou: “A liberdade foi a consequência; o desejo de liberdade não foi necessariamente a causa”. Segundo essa afirmação e os conhecimentos sobre o assunto, é correto afirmar:
    Escolha uma alternativa para a questão 36d01120-b0
  • 36CCF245-B0

    História

    História do Brasil
    UFPR · 2011MédioEntre para guardar nos favoritos

    Ao longo do período que se estende de 1964 a 1983, no Brasil, estima-se que 50 mil pessoas foram diretamente atingidas com os atos repressivos do governo militar, tendo, a maioria, passagem nas prisões; destas, 20 mil sofreram tortura física, e pelo menos 360 foram mortas. Destas, 144 são oficialmente consideradas desaparecidas; 7.367 foram acusadas; 10.034 atingidas na fase de inquérito em 707 processos judiciais; 4.862 cassadas em definitivo; 6.592 militares atingidos principalmente com a exoneração de seus postos; finalmente, 780 cassações de mandato por 10 anos. Sobre o período em que se vivenciou tal violência de Estado, considere as seguintes afirmativas:


    1. As medidas repressivas eram justificadas em nome da defesa da segurança nacional.

    2. Em paralelo à tentativa de eliminar os adversários, o governo fazia ampla propaganda sobre a expansão econômico-industrial, o que era designado como “milagre brasileiro”.

    3. O governo objetivava perseguir os membros dos partidos de inspiração marxista, cujos ideólogos defendiam a luta armada.

    4. Os atos de “exceção”, como foram conhecidas tais medidas, levaram a que as oposições ao governo se mobilizassem em favor da anistia, iniciativa que buscava também o retorno ao Estado de Direito.

    5. Os responsáveis pelas torturas e prisões arbitrárias foram processados e condenados após a redemocratização do país.


    Assinale a alternativa correta.

    Escolha uma alternativa para a questão 36ccf245-b0
  • 36C964AC-B0

    Conhecimentos Gerais

    Conhecimentos Gerais Sobre Arte e Cultura
    UFPR · 2011MédioEntre para guardar nos favoritos
    “A ambição do grupo [modernista] era grande: educar o Brasil, curá-lo do analfabetismo letrado, e, sobretudo, pesquisar uma maneira nova de expressão, compatível com o tempo do cinema, do telégrafo sem fio, das travessias aéreas intercontinentais”. (Boaventura, M. E. A Semana de Arte Moderna e a Crítica Contemporânea: vanguarda e modernidade nas artes brasileiras. Conferência – IEL-Unicamp, 2005, p.5-6. Fonte: http://www.iar.unicamp.br/dap/vanguarda/artigos.html). 
    Conforme o trecho acima e os conhecimentos sobre a Semana de Arte Moderna de 1922 e o modernismo brasileiro subsequente, é correto afirmar:
    Escolha uma alternativa para a questão 36c964ac-b0
  • 36C57764-B0

    Conhecimentos Gerais

    Movimentos Sociais, Discriminação e Desigualdade: Raça, classe e gênero
    UFPR · 2011FácilEntre para guardar nos favoritos
    Considerando os conhecimentos sobre os movimentos de esquerda política na Europa ao longo do século XIX, é correto afirmar:
    Escolha uma alternativa para a questão 36c57764-b0
  • 36C143CB-B0

    Conhecimentos Gerais

    Movimentos Sociais, Discriminação e Desigualdade: Raça, classe e gênero
    UFPR · 2011MédioEntre para guardar nos favoritos

    Foi a Revolução Francesa, e não a Americana, que ateou fogo ao mundo, e foi, consequentemente, do curso da Revolução Francesa, e não do desenrolar dos acontecimentos na América, ou dos atos dos “Pais Fundadores” que o atual uso da palavra revolução recebeu suas conotações e matizes em todos os lugares, inclusive nos Estados Unidos.

    (ARENDT, Hannah. Da Revolução. RJ: Ática e UnB, 1988, p. 44.)  

    A respeito do texto acima, considere as seguintes afirmativas:


    1. No seu uso atual, a palavra “revolução” significa uma profunda transformação política e social, capaz de romper com as estruturas do passado e criar algo novo, tal como fez a Revolução Francesa.

    2. A Revolução Francesa extinguiu o Antigo Regime e a estrutura feudal da França, enquanto que a Revolução Americana ficou restrita a mudar a realidade das 13 colônias.

    3. O fato de a Revolução Americana não ter se baseado em ideais iluministas não a caracteriza com uma revolução igual à Francesa.

    4. A Revolução Americana teve menor influência política e social fora da América, enquanto que a Revolução Francesa influenciou movimentos sociais nas Américas e em quase toda a Europa.


    Assinale a alternativa correta.

    Escolha uma alternativa para a questão 36c143cb-b0
  • 36BD7DF4-B0

    História

    Construção de Estados e o Absolutismo
    UFPR · 2011MédioEntre para guardar nos favoritos

    Tenho insistido também que a monarquia deve ser atribuída exclusivamente aos varões, já que a ginecocracia vai contra a lei natural; esta deu aos homens a força, a prudência, as armas, o poder. A lei de Deus ordena explicitamente que a mulher se submeta ao homem, não só no governo de reinos e impérios, mas também na família. (...) Também a lei civil proíbe à mulher os cargos e ofícios próprios ao homem. (...) É extremamente perigoso que uma mulher ostente a soberania. (...) No caso de uma rainha que não contraia o matrimônio – caso de uma verdadeira ginecocracia –, o Estado está exposto a graves perigos procedentes tanto dos estrangeiros como dos súditos, pois caso seja um povo generoso e de bom ânimo suportará mal que uma mulher exerça o poder.

    (Jean Bodin, Los seis libros de la republica. Edição espanhola de 1973, p. 224.) 

    A citação extraída do livro do jurista francês Jean Bodin (1530-1596), publicado em 1576, refere-se ao exercício do poder soberano por mulheres, algo que seria contrário às leis da natureza, à lei de Deus e às leis civis, de acordo com o pensamento político da época. Contudo, uma importante monarca contemporânea a Bodin, Elizabeth Tudor, exerceu o poder político em condições adversas e muitas vezes ameaçadoras à sua integridade física, e seu longo reinado foi considerado pelos historiadores como a “época dourada” da Inglaterra. Sobre a monarquia e o exercício do poder soberano, é correto afirmar:
    Escolha uma alternativa para a questão 36bd7df4-b0
  • 36BA78BC-B0

    História

    Antiguidade Ocidental (Gregos, Romanos e Macedônios)
    UFPR · 2011FácilEntre para guardar nos favoritos
    Sobre o período helenístico (séculos IV a II a.C.) é correto afirmar:
    Escolha uma alternativa para a questão 36ba78bc-b0
  • 36B6EEAD-B0

    Matemática

    Circunferências e Círculos
    UFPR · 2011FácilEntre para guardar nos favoritos
    Num projeto hidráulico, um cano com diâmetro externo de 6 cm será encaixado no vão triangular de uma superfície, como ilustra a figura ao lado. Que porção x da altura do cano permanecerá acima da superfície?


    Imagem da questão de Matemática, da prova de 2011
    Escolha uma alternativa para a questão 36b6eead-b0
  • 36B3ACCF-B0

    Matemática

    Funções
    UFPR · 2011MédioEntre para guardar nos favoritos

    Para se calcular a intensidade luminosa L, medida em lumens, a uma profundidade de x centímetros num determinado lago, utiliza-se a lei de Beer-Lambert, dada pela seguinte fórmula:


    log (L /15 ) = −0,08x


    Qual a intensidade luminosa L a uma profundidade de 12,5 cm?

    Escolha uma alternativa para a questão 36b3accf-b0
  • 36AD6DF4-B0

    Matemática

    Geometria Espacial
    UFPR · 2011FácilEntre para guardar nos favoritos

    Todas as faces de um cubo sólido de aresta 9 cm foram pintadas de verde. Em seguida, por meio de cortes paralelos a cada uma das faces, esse cubo foi dividido em cubos menores, todos com aresta 3 cm. Com relação a esses cubos, considere as seguintes afirmativas:


    1. Seis desses cubos menores terão exatamente uma face pintada de verde.

    2. Vinte e quatro desses cubos menores terão exatamente duas faces pintadas de verde.

    3. Oito desses cubos menores terão exatamente três faces pintadas de verde.

    4. Um desses cubos menores não terá nenhuma das faces pintada de verde.


    Assinale a alternativa correta.

    Escolha uma alternativa para a questão 36ad6df4-b0
  • 36A8E2E3-B0

    Matemática

    Geometria Plana
    UFPR · 2011MédioEntre para guardar nos favoritos

    Na figura ao lado estão representados, em um sistema cartesiano de coordenadas, um quadrado cinza de área 4 unidades, um quadrado hachurado de área 9 unidades e a reta r que passa por um vértice de cada quadrado. Nessas condições, a equação da reta r é:


    Imagem da questão de Matemática, da prova de 2011

    Escolha uma alternativa para a questão 36a8e2e3-b0
  • C03EFC1A-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010MédioEntre para guardar nos favoritos
         Germans make wonderful beer. Yet the productivity of the German beer industry is only 43 percent that of the U.S. beer industry. Meanwhile, the German metalworking and steel industries are equal in productivity to their American counterparts. Since the Germans are evidently capable of organizing industries well, why can’t they do so when it comes to beer?
         It turns out that the German beer industry suffers from small-scale production. There are a thousand tiny beer companies in Germany, shielded from competition with one another because each German brewery has virtually a local monopoly, and they are also shielded from competition with imports. The United States has 67 major beer breweries, producing 23 billion liters of beer per year. All of Germany’s 1,000 breweries combined produce only half as much. Thus the average U.S. brewery produces 31 times more beer than the average German brewery. 
         This fact results from local tastes and German government policies. German beer drinkers are fiercely loyal to their local brand, so there are no national brands in Germany analogous to our Budweiser, Miller, or Coors. Instead, most German beer is consumed within 30 miles of the factory where it is brewed. Therefore, the German beer industry cannot profit from economies of scale. In the beer business, as in other businesses, production costs decrease greatly with scale. The bigger the refrigerating unit for making beer, and the longer the assembly line for filling bottles with beer, the lower the cost of manufacturing beer. Those tiny German beer companies are relatively inefficient. There’s no competition; there are just a thousand local monopolies. 
         The local beer loyalties of individual German drinkers are reinforced by German laws that make it hard for foreign beers to compete in the German market. The German government has so-called beer purity laws that specify exactly what can go into beer. Not surprisingly, those government purity specifications are based on what German breweries put into beer, and not what American, French, and Swedish breweries like to put into beer. Because of those laws, not much foreign beer gets exported to Germany, and because of inefficiency and high prices much less of that wonderful German beer than you would otherwise expect gets sold abroad. (Before you object that German Löwenbräu beer is widely available in the United States, please read the label on the next bottle of Löwenbräu that you drink here: it’s not produced in Germany but in North America, under license, in big factories with North American productivities and efficiencies of scale). 
    (Diamond, J. ,2005. Guns, Germs, and Steel. New York: Norton.)  
    According to the text, why does Germany export so little beer to the U.S.?
    Escolha uma alternativa para a questão c03efc1a-b0
  • C03B2772-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010FácilEntre para guardar nos favoritos
         Germans make wonderful beer. Yet the productivity of the German beer industry is only 43 percent that of the U.S. beer industry. Meanwhile, the German metalworking and steel industries are equal in productivity to their American counterparts. Since the Germans are evidently capable of organizing industries well, why can’t they do so when it comes to beer?
         It turns out that the German beer industry suffers from small-scale production. There are a thousand tiny beer companies in Germany, shielded from competition with one another because each German brewery has virtually a local monopoly, and they are also shielded from competition with imports. The United States has 67 major beer breweries, producing 23 billion liters of beer per year. All of Germany’s 1,000 breweries combined produce only half as much. Thus the average U.S. brewery produces 31 times more beer than the average German brewery. 
         This fact results from local tastes and German government policies. German beer drinkers are fiercely loyal to their local brand, so there are no national brands in Germany analogous to our Budweiser, Miller, or Coors. Instead, most German beer is consumed within 30 miles of the factory where it is brewed. Therefore, the German beer industry cannot profit from economies of scale. In the beer business, as in other businesses, production costs decrease greatly with scale. The bigger the refrigerating unit for making beer, and the longer the assembly line for filling bottles with beer, the lower the cost of manufacturing beer. Those tiny German beer companies are relatively inefficient. There’s no competition; there are just a thousand local monopolies. 
         The local beer loyalties of individual German drinkers are reinforced by German laws that make it hard for foreign beers to compete in the German market. The German government has so-called beer purity laws that specify exactly what can go into beer. Not surprisingly, those government purity specifications are based on what German breweries put into beer, and not what American, French, and Swedish breweries like to put into beer. Because of those laws, not much foreign beer gets exported to Germany, and because of inefficiency and high prices much less of that wonderful German beer than you would otherwise expect gets sold abroad. (Before you object that German Löwenbräu beer is widely available in the United States, please read the label on the next bottle of Löwenbräu that you drink here: it’s not produced in Germany but in North America, under license, in big factories with North American productivities and efficiencies of scale). 
    (Diamond, J. ,2005. Guns, Germs, and Steel. New York: Norton.)  
    How does Germany protect its beer industry, according to the text?
    Escolha uma alternativa para a questão c03b2772-b0
  • C0376C7F-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010FácilEntre para guardar nos favoritos
         Germans make wonderful beer. Yet the productivity of the German beer industry is only 43 percent that of the U.S. beer industry. Meanwhile, the German metalworking and steel industries are equal in productivity to their American counterparts. Since the Germans are evidently capable of organizing industries well, why can’t they do so when it comes to beer?
         It turns out that the German beer industry suffers from small-scale production. There are a thousand tiny beer companies in Germany, shielded from competition with one another because each German brewery has virtually a local monopoly, and they are also shielded from competition with imports. The United States has 67 major beer breweries, producing 23 billion liters of beer per year. All of Germany’s 1,000 breweries combined produce only half as much. Thus the average U.S. brewery produces 31 times more beer than the average German brewery. 
         This fact results from local tastes and German government policies. German beer drinkers are fiercely loyal to their local brand, so there are no national brands in Germany analogous to our Budweiser, Miller, or Coors. Instead, most German beer is consumed within 30 miles of the factory where it is brewed. Therefore, the German beer industry cannot profit from economies of scale. In the beer business, as in other businesses, production costs decrease greatly with scale. The bigger the refrigerating unit for making beer, and the longer the assembly line for filling bottles with beer, the lower the cost of manufacturing beer. Those tiny German beer companies are relatively inefficient. There’s no competition; there are just a thousand local monopolies. 
         The local beer loyalties of individual German drinkers are reinforced by German laws that make it hard for foreign beers to compete in the German market. The German government has so-called beer purity laws that specify exactly what can go into beer. Not surprisingly, those government purity specifications are based on what German breweries put into beer, and not what American, French, and Swedish breweries like to put into beer. Because of those laws, not much foreign beer gets exported to Germany, and because of inefficiency and high prices much less of that wonderful German beer than you would otherwise expect gets sold abroad. (Before you object that German Löwenbräu beer is widely available in the United States, please read the label on the next bottle of Löwenbräu that you drink here: it’s not produced in Germany but in North America, under license, in big factories with North American productivities and efficiencies of scale). 
    (Diamond, J. ,2005. Guns, Germs, and Steel. New York: Norton.)  
    Which of these statements DOES NOT CORRESPOND to information given in the text?
    Escolha uma alternativa para a questão c0376c7f-b0
  • C03464B3-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010DifícilEntre para guardar nos favoritos
         Germans make wonderful beer. Yet the productivity of the German beer industry is only 43 percent that of the U.S. beer industry. Meanwhile, the German metalworking and steel industries are equal in productivity to their American counterparts. Since the Germans are evidently capable of organizing industries well, why can’t they do so when it comes to beer?
         It turns out that the German beer industry suffers from small-scale production. There are a thousand tiny beer companies in Germany, shielded from competition with one another because each German brewery has virtually a local monopoly, and they are also shielded from competition with imports. The United States has 67 major beer breweries, producing 23 billion liters of beer per year. All of Germany’s 1,000 breweries combined produce only half as much. Thus the average U.S. brewery produces 31 times more beer than the average German brewery. 
         This fact results from local tastes and German government policies. German beer drinkers are fiercely loyal to their local brand, so there are no national brands in Germany analogous to our Budweiser, Miller, or Coors. Instead, most German beer is consumed within 30 miles of the factory where it is brewed. Therefore, the German beer industry cannot profit from economies of scale. In the beer business, as in other businesses, production costs decrease greatly with scale. The bigger the refrigerating unit for making beer, and the longer the assembly line for filling bottles with beer, the lower the cost of manufacturing beer. Those tiny German beer companies are relatively inefficient. There’s no competition; there are just a thousand local monopolies. 
         The local beer loyalties of individual German drinkers are reinforced by German laws that make it hard for foreign beers to compete in the German market. The German government has so-called beer purity laws that specify exactly what can go into beer. Not surprisingly, those government purity specifications are based on what German breweries put into beer, and not what American, French, and Swedish breweries like to put into beer. Because of those laws, not much foreign beer gets exported to Germany, and because of inefficiency and high prices much less of that wonderful German beer than you would otherwise expect gets sold abroad. (Before you object that German Löwenbräu beer is widely available in the United States, please read the label on the next bottle of Löwenbräu that you drink here: it’s not produced in Germany but in North America, under license, in big factories with North American productivities and efficiencies of scale). 
    (Diamond, J. ,2005. Guns, Germs, and Steel. New York: Norton.)  
    Are the statements true (T) or false (F), according to the text?

    ( ) The United States produces less beer than Germany.
    ( ) The German steel industry is better organized than the German beer industry.
    ( ) The German metalworking industry is more productive than the American metalworking industry.
    ( ) In Germany there are more factories producing beer than in the United States.
    ( ) 43% of the beer sold in the United States is produced in Germany.

    Mark the alternative which presents the correct sequence, from top to bottom.
    Escolha uma alternativa para a questão c03464b3-b0
  • C0318FF4-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010Muito fácilEntre para guardar nos favoritos
    Lucy’s Big Brother Reveals New Facets of her Species

         First came Lucy. Then came Lucy’s baby, an infant of her species. Now comes Lucy’s “big brother”: the partial skeleton of a large male of Australopithecus afarensis, unveiled this week in the Proceedings of the National Academy of Sciences. The roughly 40% complete skeleton has been nicknamed Kadanuumuu, which means “big man” in the Afar language of the Afar Depression of Ethiopia, where it was found. “It was huge – a big man, with long legs”, says lead author Yohannes Haile-Selassie, a palaeoanthropologist at the Cleveland Museum of Natural History in Ohio.
         Dated to 3.6 million years ago, the new skeleton is almost half a million years older than Lucy and the second oldest skeleton found of a possible human ancestor. It had long legs and a torso and a pelvis more like those of a modern human than an African ape, showing that fully upright walking was in place at this early date, Haile-Selassie says. Although headless, the skeleton also preserves parts not found before in Lucy’s species. “It is important because it provides the ribs and scapula”, says palaeoanthropologist Carol Ward of the University of Missouri, Columbia.
         In 2005, a sharp-eyed member of Haile-Selassie’s team, Alemayehu Asfaw, spotted a fragment of lower arm bone on the ground at Woranso-Mille, about 48 kilometers north of Lucy’s grave at Hadar. Over the next 4 years, the team unearthed the shoulder blade, collarbone, ribs, and neck vertebra, the first time those bones were found together in an A. afarensis adult. The team also found a pelvis, an arm, and leg bones. Although they never found the skull or teeth, which are typically used to assign species, the skeleton’s age and similarity to Lucy suggest that it belongs to her species, says co-author Owen Lovejoy of Kent State University in Ohio.
         The robust male stood between 1.5 and 1.7 meters tall, about 30% larger than Lucy. Isolated bones of other individuals suggest that some males were even larger, so the new skeleton doesn’t settle a long-standing debate over just how much sexual dimorphism there was in A. afarensis, Lovejoy says. The shoulder blade looks more like that of a gorilla and a modern human than that of a chimpanzee. The curvature of the second rib suggests a wide rib cage at the top and a barrel shape overall, similar to that of modern humans and distinct from the more funnel-shaped rib cage of a chimpanzee, the authors say.
    (Science Magazine, 25 June 2010.)
    Why do palaeoanthropologists believe the skeleton may be a human ancestor?
    Escolha uma alternativa para a questão c0318ff4-b0
  • C02B68AF-B0

    Inglês

    Interpretação de texto | Reading comprehension
    UFPR · 2010FácilEntre para guardar nos favoritos
    Lucy’s Big Brother Reveals New Facets of her Species

         First came Lucy. Then came Lucy’s baby, an infant of her species. Now comes Lucy’s “big brother”: the partial skeleton of a large male of Australopithecus afarensis, unveiled this week in the Proceedings of the National Academy of Sciences. The roughly 40% complete skeleton has been nicknamed Kadanuumuu, which means “big man” in the Afar language of the Afar Depression of Ethiopia, where it was found. “It was huge – a big man, with long legs”, says lead author Yohannes Haile-Selassie, a palaeoanthropologist at the Cleveland Museum of Natural History in Ohio.
         Dated to 3.6 million years ago, the new skeleton is almost half a million years older than Lucy and the second oldest skeleton found of a possible human ancestor. It had long legs and a torso and a pelvis more like those of a modern human than an African ape, showing that fully upright walking was in place at this early date, Haile-Selassie says. Although headless, the skeleton also preserves parts not found before in Lucy’s species. “It is important because it provides the ribs and scapula”, says palaeoanthropologist Carol Ward of the University of Missouri, Columbia.
         In 2005, a sharp-eyed member of Haile-Selassie’s team, Alemayehu Asfaw, spotted a fragment of lower arm bone on the ground at Woranso-Mille, about 48 kilometers north of Lucy’s grave at Hadar. Over the next 4 years, the team unearthed the shoulder blade, collarbone, ribs, and neck vertebra, the first time those bones were found together in an A. afarensis adult. The team also found a pelvis, an arm, and leg bones. Although they never found the skull or teeth, which are typically used to assign species, the skeleton’s age and similarity to Lucy suggest that it belongs to her species, says co-author Owen Lovejoy of Kent State University in Ohio.
         The robust male stood between 1.5 and 1.7 meters tall, about 30% larger than Lucy. Isolated bones of other individuals suggest that some males were even larger, so the new skeleton doesn’t settle a long-standing debate over just how much sexual dimorphism there was in A. afarensis, Lovejoy says. The shoulder blade looks more like that of a gorilla and a modern human than that of a chimpanzee. The curvature of the second rib suggests a wide rib cage at the top and a barrel shape overall, similar to that of modern humans and distinct from the more funnel-shaped rib cage of a chimpanzee, the authors say.
    (Science Magazine, 25 June 2010.)
    Where was the skeleton found?
    Escolha uma alternativa para a questão c02b68af-b0
  • C0259081-B0

    Física

    Ótica
    UFPR · 2010DifícilEntre para guardar nos favoritos
    Ao incidir sobre um prisma de vidro, um feixe de luz branca é decomposto em várias cores. Esse fenômeno acontece porque as ondas eletromagnéticas de diferentes comprimentos de onda se propagam no vidro com diferentes velocidades, de modo que o índice de refração n tem valor diferente para cada comprimento de onda. O estudo das propriedades óticas de um pedaço de vidro forneceu o gráfico ao lado para o índice de refração em função do comprimento de onda λ da luz. Suponha a velocidade da luz no vácuo igual a 3,0 × 108 m/s. Com base nos conceitos de ótica e nas informações do gráfico, assinale a alternativa correta.
    Imagem da questão de Física, da prova de 2010
    Escolha uma alternativa para a questão c0259081-b0
  • C022C781-B0

    Física

    Magnetismo
    UFPR · 2010Muito fácilEntre para guardar nos favoritos
    Na segunda década do século XIX, Hans Christian Oersted demonstrou que um fio percorrido por uma corrente elétrica era capaz de causar uma perturbação na agulha de uma bússola. Mais tarde, André Marie Ampère obteve uma relação matemática para a intensidade do campo magnético produzido por uma corrente elétrica que circula em um fio condutor retilíneo. Ele mostrou que a intensidade do campo magnético depende da intensidade da corrente elétrica e da distância ao fio condutor. Com relação a esse fenômeno, assinale a alternativa correta.
    Escolha uma alternativa para a questão c022c781-b0