{"id":3778,"date":"2018-02-15T10:02:52","date_gmt":"2018-02-15T10:02:52","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=3778"},"modified":"2024-08-20T18:06:25","modified_gmt":"2024-08-20T18:06:25","slug":"resolucao-comentada-eletrostatica-campo-eletrico-potencial-eletrico","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/enem\/eletrostatica-campo-eletrico-potencial-eletrico\/resolucao-comentada-eletrostatica-campo-eletrico-potencial-eletrico\/","title":{"rendered":"Eletrost\u00e1tica &#8211; Resolu\u00e7\u00e3o"},"content":{"rendered":"<p align=\"CENTER\"><span style=\"color: #c00000;\">\u00a0<span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>Resolu\u00e7\u00e3o Comentada<\/b><\/span><\/span><\/span><b> <\/b><\/p>\n<p align=\"CENTER\"><span style=\"color: #0000cc;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>Eletrost\u00e1tica<\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>Campo El\u00e9trico \u2013 Potencial El\u00e9trico<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>01-(ENEM-MEC)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>A despolariza\u00e7\u00e3o ocorre na fase em que o potencial atinge o limiar (linha tracejada) e sobe, que \u00e9 a fase 0\u00a0 &#8212;\u00a0\u00a0 repolariza\u00e7\u00e3o ocorre quando o potencial est\u00e1 voltando ao potencial de repouso, o que ocorre na fase 3.\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- B<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>02- (ENEM-MEC)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Poder das pontas<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0&#8211; se o campo el\u00e9trico que est\u00e1 pr\u00f3ximo das pontas de certo condutor estiver muito intenso com uma quantidade maior de cargas el\u00e9tricas, ele pode ionizar os \u00e1tomos dos <\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_90b6e9f6.jpg\" alt=\"\" width=\"536\" height=\"279\" name=\"Imagem 54\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>elementos que formam o ar, que passa a n\u00e3o ser mais um isolante, tornando-se assim um condutor el\u00e9trico, e o condutor se descarrega atrav\u00e9s das pontas. Esse fen\u00f4meno \u00e9 chamado poder das pontas e \u00e9 baseado nele o funcionamento dos p\u00e1ra-raios\u00a0 &#8212;\u00a0 portanto, nas pontas de um condutor eletrizado, encontramos uma quantidade maior de cargas por unidade de \u00e1rea\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- A.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>03-(ENEM-MEC)\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Blindagem eletrost\u00e1tica \u2013 Se, no interior de um condutor oco em equil\u00edbrio eletrost\u00e1tico o campo el\u00e9trico\u00a0<img decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_11bf866f.jpg\" alt=\"\" width=\"14\" height=\"17\" name=\"Imagem 55\" align=\"BOTTOM\" border=\"0\" \/>\u00e9 nulo, qualquer aparelho el\u00e9trico e eletr\u00f4nico, quando colocado em seu interior ficar\u00e1 protegido de influ\u00eancias perturbadoras externas\u00a0 &#8212;\u00a0 esse fen\u00f4meno foi comprovado experimentalmente por Michael Faraday ao encerrar-se no interior de uma gaiola condutora, ondeverificou n\u00e3o haver manifesta\u00e7\u00e3o de fen\u00f4menos el\u00e9tricos no seu interior. Essa gaiola deve ser feita de material condutor de eletricidade e n\u00e3o precisa ser cont\u00ednua, podendo ser uma rede met\u00e1lica, por isso recebeu o nome de gaiola.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b><br \/>\nFoi adaptada para proteger instrumentos e aparelhos de grande sensibilidade colocados em seu interior. Observe na figura abaixo que a esfera do p\u00eandulo eletrost\u00e1tico quando est\u00e1 no interior da gaiola, n\u00e3o sofre influ\u00eancias el\u00e9tricas da esfera externa eletrizada.<\/b><\/span><\/span><\/span><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_c8b3eccf.jpg\" alt=\"\" width=\"765\" height=\"238\" name=\"Imagem 57\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>A blindagem eletrost\u00e1tica (gaiola de Faraday) tamb\u00e9m \u00e9 utilizada nos carros e avi\u00f5es, oferecendo <\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_eaf592db.png\" alt=\"\" width=\"760\" height=\"167\" name=\"Imagem 86\" align=\"BOTTOM\" border=\"0\" \/><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>prote\u00e7\u00e3o contra descargas\u00a0el\u00e9tricas. Constru\u00e7\u00f5es tamb\u00e9m s\u00e3o feitas utilizando blindagem eletrost\u00e1tica, a fim de proteger seus equipamentos el\u00e9tricos e eletr\u00f4nicos<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- B<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>04-(UERJ-RJ)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>A intensidade da for\u00e7a f entre duas cargas el\u00e9tricas iguais q separadas por uma dist\u00e2ncia r \u00e9 fornecida por f=k.q.q\/r<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 entre as cargas 2q e 3q separadas pela mesma dist\u00e2ncia r ser\u00e1\u00a0 &#8212;\u00a0 f\u2019=k.2q.3q\/r<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=6k.q.q\/r<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=6f\u00a0 &#8212; f\u2019=6f\u00a0 &#8212;\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>05-(FGV-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>For\u00e7a el\u00e9trica\u00a0 &#8212;\u00a0 Fe=KQq\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 for\u00e7a gravitacional\u00a0 &#8212;\u00a0 FG=GMm\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 igualando-as\u00a0 &#8212;\u00a0 KQq\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0= GMm\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 KQ<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0= GM<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2\u00a0<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b> &#8212;\u00a0 M<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Q<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=KG\u00a0 &#8212;\u00a0 MQ=\u221a(KG)\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- C<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>06-\u00a0(UFPE-PE)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Quando r=3m\u00a0 &#8212;\u00a0 F=2,5.10-4N\u00a0 &#8212;\u00a0 F=KQq\/r<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 2,5.10<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>-4<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=9.109.Q.Q\/32\u00a0 &#8212;\u00a0 Q2=2,5.10<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>-13<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=25.10<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>-14<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 Q=5.10<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>-7<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>C\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>07-(UFG-GO)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Observe as figuras abaixo:<\/b><\/span><\/span><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_b9b12347.jpg\" alt=\"\" width=\"781\" height=\"171\" name=\"Imagem 62\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- D<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>08-(FGV-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Em cada uma das extremidades das quatro diagonais que passam pelo centro do cubo h\u00e1 duas <\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_6eccf5b1.jpg\" alt=\"\" width=\"363\" height=\"206\" name=\"Imagem 63\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>cargas de mesmo m\u00f3dulo e de\u00a0mesmo sinal. Elas exercem na carga central (tamb\u00e9m de mesmo sinal e mesmo m\u00f3dulo que as dos v\u00e9rtices) for\u00e7as de mesma intensidade e de sentidos opostos. Portanto, essas for\u00e7as se equilibram, sendo ent\u00e3o nula a resultante dessas for\u00e7as.\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- A<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>09-(FUVEST-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>I. Certo\u00a0 &#8212;\u00a0 s\u00f3 surge for\u00e7a sobre a carga se existir campo el\u00e9trico que origina essa for\u00e7a.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>II. Certo\u00a0 &#8212;\u00a0 se n\u00e3o tiver carga, pode existir o campo el\u00e9trico sem existir for\u00e7a el\u00e9trica.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>III. Errado &#8212;\u00a0 n\u00e3o surgir\u00e1 for\u00e7a sobre a carga se n\u00e3o houver campo el\u00e9trico<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- D<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>10-(UCSal-BA)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><span style=\"color: #0000cc;\">\u00a0<\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>O ponto P onde o campo el\u00e9trico resultante deve se anular deve estar \u00e0 direita de Q (observe <\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_140a8119.jpg\" alt=\"\" width=\"698\" height=\"137\" name=\"Imagem 64\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>figura)\u00a0 &#8212; a carga &#8211; 4Q cria campo de aproxima\u00e7\u00e3o e a carga + Q, de afastamento\u00a0 &#8212;\u00a0 E<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=K4Q\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0E<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=KQ\/(d \u2013 3)<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 E<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=E<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 4KQ\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=KQ\/(d \u2013 3)<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0 &#8212;\u00a0 (d \u2013 3)<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sup><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sup><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=1\/4\u00a0 &#8212;\u00a0 (d \u2013 3)\/d=1\/2\u00a0 &#8212;\u00a0 d=6 unidades\u00a0 &#8212;\u00a0 \u00e9 nulo no ponto 10.\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- A<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>11-(FUVEST-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>A \u00fanica alternativa em que o objeto com carga positiva n\u00e3o \u00e9 desviado (for\u00e7a resultante nula) durante a queda \u00e9 a E (veja figura abaixo):<\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_15204e6f.jpg\" alt=\"\" width=\"306\" height=\"258\" name=\"Imagem 65\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>E (veja figura acima).<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>12-(FUVEST-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Os n\u00eautrons n\u00e3o sofrem desvio e o campo el\u00e9trico desvia os pr\u00f3tons para baixo (s\u00e3o repelidos pela placa positiva)\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>13-(UFMS-MS)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- C<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>&#8212;\u00a0 os dipolos est\u00e3o flutuando\u00a0 &#8212;\u00a0 as for\u00e7as peso e el\u00e9trica se anulam\u00a0 &#8212;\u00a0 observe que os dipolos ficar\u00e3o alinhados predominantemente na dire\u00e7\u00e3o vertical com as cargas negativas voltadas para baixo (repuls\u00e3o) e as positivas para cima (atra\u00e7\u00e3o)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>14-(FATEC-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Coment\u00e1rio: materiais met\u00e1licos apresentam maior condutividade el\u00e9trica, por isso s\u00e3o mais facilmente polarizados e atra\u00eddos por campos el\u00e9tricos externos.\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- B<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>15-(UFV-MG)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Saem da A e da C (positivas) e chegam a B (negativa)\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>16-(PUC-RS)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Os pontos devem estar equidistantes de Q\u00a0 &#8212;\u00a0 veja figura abaixo:<\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_c5140952.jpg\" alt=\"\" width=\"549\" height=\"239\" name=\"Imagem 66\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- B<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>17-(UNIFESP-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Todos os pontos de cada superf\u00edcie equipotencial possuem o mesmo potencial el\u00e9trico\u00a0 &#8212;\u00a0 o trabalho realizado para levar a carga de um ponto ao outro independe da trajet\u00f3ria, dependendo apenas\u00a0 do potencial nos pontos inicial e final\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>W=q(VA\u00a0\u2013 VB)\u00a0 &#8212;\u00a0 observe que a maior ddp (VA\u00a0\u2013 VB) \u00e9 a da trajet\u00f3ria V\u00a0 &#8212;\u00a0\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>18-(ITA-SP)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Kq<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0+ Kq<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>2<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\/(6 \u2013 d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>)=0\u00a0 &#8212;\u00a0 K.1\/d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0\u2013 K.2\/(6 \u2013 d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>)=0\u00a0 &#8212;\u00a0 d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>=2m\u00a0 &#8212; \u00a0potencial \u00e9 nulo a 2m de d<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>, ou seja, <\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_35c16843.jpg\" alt=\"\" width=\"620\" height=\"146\" name=\"Imagem 67\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>nos pontos x=-4m e<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>x=4m e, em todos os pontos que constituem uma esfera de raio 4m (superf\u00edcie equipotencial)\u00a0 &#8212;\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- A<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>19-(UFV-MG)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Blindagem eletrost\u00e1tica \u2013 Se, no interior de um condutor oco em equil\u00edbrio eletrost\u00e1tico o campo el\u00e9trico\u00a0<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_11bf866f.jpg\" alt=\"\" width=\"14\" height=\"17\" name=\"Imagem 68\" align=\"BOTTOM\" border=\"0\" \/>\u00e9 nulo, qualquer aparelho el\u00e9trico e eletr\u00f4nico, quando colocado em seu interior ficar\u00e1 protegido de influ\u00eancias perturbadoras externas.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Esse fen\u00f4meno foi comprovado experimentalmente por Michael Faraday ao encerrar-se no interior de uma gaiola condutora, onde verificou n\u00e3o haver manifesta\u00e7\u00e3o de fen\u00f4menos el\u00e9tricos no seu interior. Essa gaiola deve ser feita de material condutor de eletricidade e n\u00e3o precisa ser cont\u00ednua, podendo ser uma rede met\u00e1lica, por isso recebeu o nome de gaiola.<\/b><\/span><\/span><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_1eb6add3.jpg\" alt=\"\" width=\"780\" height=\"210\" name=\"Imagem 69\" align=\"BOTTOM\" border=\"0\" \/><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Foi adaptada para proteger instrumentos e aparelhos de grande sensibilidade colocados em seu interior. Observe na figura abaixo que a esfera do p\u00eandulo eletrost\u00e1tico quando est\u00e1 no interior da gaiola, n\u00e3o sofre influ\u00eancias el\u00e9tricas da esfera externa eletrizada.<\/b><\/span><\/span><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_c8b3eccf.jpg\" alt=\"\" width=\"780\" height=\"243\" name=\"Imagem 70\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>A blindagem eletrost\u00e1tica (gaiola de Faraday) tamb\u00e9m \u00e9 utilizada nos carros e avi\u00f5es, oferecendo prote\u00e7\u00e3o contra descargas<\/b><\/span><\/span><\/span><\/p>\n<p align=\"CENTER\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_b57da7b5.jpg\" alt=\"\" width=\"204\" height=\"120\" name=\"Imagem 71\" align=\"BOTTOM\" border=\"0\" \/><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_83d7129d.jpg\" alt=\"\" width=\"173\" height=\"118\" name=\"Imagem 72\" align=\"BOTTOM\" border=\"0\" \/><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_fb9da8dd.jpg\" alt=\"\" width=\"134\" height=\"119\" name=\"Imagem 73\" align=\"BOTTOM\" border=\"0\" \/><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/fisicaevestibular.com.br\/novo\/wp-content\/uploads\/migracao\/enem\/35\/ENEM35_html_a718a6fe.jpg\" alt=\"\" width=\"196\" height=\"132\" name=\"Imagem 74\" align=\"BOTTOM\" border=\"0\" \/><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>el\u00e9tricas. Constru\u00e7\u00f5es tamb\u00e9m s\u00e3o feitas utilizando blindagem eletrost\u00e1tica, a fim de proteger seus equipamentos el\u00e9tricos e eletr\u00f4nicos.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\">\u00a0<span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\">R- D\u00a0<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>20-(UFRGS)<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Todo excesso de carga tender\u00e1 a repelir e ficar\u00e3o concentrados na superf\u00edcie da esfera\u00a0 externa\u00a0 &#8212;<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- E<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>21-(UEG-GO)\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>Veja teoria em fisicaevestibular.com.br- eletricidade eletrost\u00e1tica-\u00a0Condutor em equil\u00edbrio eletrost\u00e1tico &#8211; Blindagem eletrost\u00e1tica\u00a0 &#8212;\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0<\/b><\/span><\/span><\/span><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- D<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<p><span style=\"color: #c00000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: large;\"><b>22-(UFMS-MS)\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>I. Correta\u00a0 &#8212;\u00a0 com S<\/b><\/span><\/span><\/span><span style=\"color: #0000cc;\"><sub><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>1<\/b><\/span><\/span><\/sub><\/span><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>\u00a0ligada, cargas el\u00e9tricas negativas do gerador fluir\u00e3o at\u00e9 a esfera condutora maci\u00e7a eletrizando-a, que por sua vez induzir\u00e3o cargas positivas na superf\u00edcie externa da casca esf\u00e9rica condutora que tamb\u00e9m induzir\u00e3o cargas no p\u00eandulo, que continua neutro, atraindo-o por indu\u00e7\u00e3o el\u00e9trica.\u00a0<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>II. Correta\u00a0 &#8212;\u00a0 veja em fisicaevestibular o processo de eletriza\u00e7\u00e3o por indu\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>III. Falsa \u00a0&#8212;\u00a0 a casca esf\u00e9rica eletrizada origina campo el\u00e9trico ao seu redor.<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>IV. Correta\u00a0 &#8212;\u00a0 veja 02<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\"><span style=\"font-family: Arial, serif;\"><span style=\"font-size: medium;\"><b>V. Falsa\u00a0 &#8212;\u00a0 veja 01<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #ff0000;\"><span style=\"font-family: Arial\\ Black, serif;\"><span style=\"font-size: medium;\"><b>R- A<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #0000cc;\">\u00a0<\/span><\/p>\n<h3><a title=\"Eletrost\u00e1tica \u2013 Campo El\u00e9trico \u2013 Potencial El\u00e9trico\" href=\"http:\/\/fisicaevestibular.com.br\/novo\/enem\/eletrostatica-campo-eletrico-potencial-eletrico\/\"><span style=\"color: #000080;\">Voltar para os exerc\u00edcios<\/span><\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0Resolu\u00e7\u00e3o Comentada Eletrost\u00e1tica Campo El\u00e9trico \u2013 Potencial El\u00e9trico 01-(ENEM-MEC) A despolariza\u00e7\u00e3o ocorre na fase em que o potencial atinge o limiar (linha tracejada) e sobe, que \u00e9 a fase 0\u00a0 &#8212;\u00a0\u00a0 repolariza\u00e7\u00e3o ocorre quando o potencial est\u00e1 voltando ao potencial de repouso, o que ocorre na fase 3.\u00a0 R- B \u00a0 02- (ENEM-MEC) Poder das pontas\u00a0&#8211; se o campo el\u00e9trico<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3776,"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-3778","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3778","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=3778"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3778\/revisions"}],"predecessor-version":[{"id":10643,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3778\/revisions\/10643"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3776"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=3778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}