{"id":1846,"date":"2016-01-25T00:56:22","date_gmt":"2016-01-25T00:56:22","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=1846"},"modified":"2024-08-19T13:00:58","modified_gmt":"2024-08-19T13:00:58","slug":"exercicios-sobre-amperimetros-e-voltimetros","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/eletricidade\/eletrodinamica\/aparelhos-de-medicao-eletrica-amperimetros-e-voltimetros\/exercicios-sobre-amperimetros-e-voltimetros\/","title":{"rendered":"Exerc\u00edcios sobre Amper\u00edmetros e Volt\u00edmetros"},"content":{"rendered":"

Exerc\u00edcios de vestibulares com resolu\u00e7\u00e3o comentada sobre<\/b><\/span><\/span><\/span><\/p>\n

Amper\u00edmetros e Volt\u00edmetros<\/b><\/span><\/span><\/span><\/p>\n

01-(UFB)<\/b><\/span><\/span><\/span> Para se determinar a resist\u00eancia R do circuito abaixo, utiliza-se dois aparelhos de medidas A e V.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) Q \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) P \u00e9 um amper\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) P \u00e9 um amper\u00edmetro e Q \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) Q \u00e9 um amper\u00edmetro e P \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) nada se pode afirmar sobre P e Q<\/b><\/span><\/span><\/p>\n

 <\/p>\n

02-(UFMG-MG)<\/b><\/span><\/span><\/span> A figura representa uma bateria, de resist\u00eancia interna desprez\u00edvel, ligada a uma l\u00e2mpada L.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Considerando desprez\u00edveis as resist\u00eancias dos amper\u00edmetros e muito grandes as resist\u00eancias dos volt\u00edmetros e sendo A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>as leituras dos amper\u00edmetros e V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>as leituras dos volt\u00edmetros, teremos:<\/b><\/span><\/span><\/p>\n

a) A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=V<\/b><\/span><\/span>2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/sub><\/p>\n

b) A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>> A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>> V<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0 > A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0 > V<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>> V<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e V<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>> V<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/p>\n

 <\/p>\n

<\/a><\/a>03-(FUVEST-SP)<\/b><\/span><\/span><\/span> Considere a montagem abaixo, composta por quatro resistores iguais R, uma fonte de tens\u00e3o F, um medidor de corrente A, um medidor de tens\u00e3o V e fios de liga\u00e7\u00e3o. O medidor de corrente indica 8,0A e o de tens\u00e3o 2,0V. Pode-se afirmar que a pot\u00eancia total dissipada nos quatro resistores \u00e9, aproximadamente, de:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

\"\"<\/p>\n

04-(UFRJ-RJ)<\/b><\/span><\/span><\/span> No circuito esquematizado na figura o amper\u00edmetro A e o volt\u00edmetro V s\u00e3o ideais.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Calcule as indica\u00e7\u00f5es do amper\u00edmetro e do volt\u00edmetro:<\/b><\/span><\/span><\/p>\n

a) com a chave C aberta<\/b><\/span><\/span><\/p>\n

b) com a chave C fechada<\/b><\/span><\/span><\/p>\n

 <\/p>\n

05-(UFB)<\/b><\/span><\/span><\/span> Nos circuitos a seguir, determine as indica\u00e7\u00f5es fornecidas pelos medidores, ambos ideais:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

 <\/p>\n

06-(UFBA)<\/b><\/span><\/span><\/span> A figura a seguir representa um circuito el\u00e9trico constitu\u00eddo de um volt\u00edmetro (V) e um amper\u00edmetro (A) ideais, cinco resistores e uma bateria. A bateria fornece tens\u00e3o de 12,0V e o volt\u00edmetro registra 6,0V.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

 <\/p>\n

a) Qual \u00e9 a leitura feita no amper\u00edmetro?<\/b><\/span><\/span><\/p>\n

b) Qual \u00e9 a diferen\u00e7a de potencial no resistor de 1,5\u2126?<\/b><\/span><\/span><\/p>\n

c) Qual a pot\u00eancia dissipada pelo resistor localizado entre X e Y?<\/b><\/span><\/span><\/p>\n

 <\/p>\n

07-(UFRJ)<\/b><\/span><\/span><\/span> O esquema da figura mostra uma parte de um circuito el\u00e9trico de corrente cont\u00ednua. O amper\u00edmetro mede sempre uma corrente de 2 A e as resist\u00eancias valem 1\u2126 cada uma.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

O volt\u00edmetro est\u00e1 ligado em paralelo com uma das resist\u00eancias.<\/b><\/span><\/span><\/p>\n

a) Calcule a leitura do volt\u00edmetro com a chave interruptora aberta.<\/b><\/span><\/span><\/p>\n

b) Calcule a leitura do volt\u00edmetro com a chave interruptora fechada.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

08-(UNESP-SP)<\/b><\/span><\/span><\/span> No circuito da figura, a fonte \u00e9 uma bateria de fem E=12V, o resistor tem resist\u00eancia R=1.000\u2126. V representa um volt\u00edmetro e A um amper\u00edmetro.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Determine a leitura desses medidores:<\/b><\/span><\/span><\/p>\n

a) em condi\u00e7\u00f5es ideais, ou seja, supondo que os fios e o amper\u00edmetro n\u00e3o tenham resist\u00eancia el\u00e9trica e que a resist\u00eancia el\u00e9trica do volt\u00edmetro seja infinita.<\/b><\/span><\/span><\/p>\n

b) em condi\u00e7\u00f5es reais, em que as resist\u00eancias el\u00e9tricas da bateria, do amper\u00edmetro e do volt\u00edmetro s\u00e3o r=1,0\u2126, R<\/b><\/span><\/span>A<\/b><\/span><\/span><\/sub>=50\u2126 e R<\/b><\/span><\/span>V<\/b><\/span><\/span><\/sub>=10.000\u2126, respectivamente, desprezando apenas a resist\u00eancia dos fios de liga\u00e7\u00e3o.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

09-(FUVEST-SP)<\/b><\/span><\/span><\/span> No circuito da figura, E=8V, r=100\u2126 e R=1.200\u2126.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) Qual a leitura do amper\u00edmetro A?<\/b><\/span><\/span><\/p>\n

b) Qual a leitura no volt\u00edmetro V?<\/b><\/span><\/span><\/p>\n

 <\/p>\n

10-(FUVEST-SP)<\/b><\/span><\/span><\/span> No circuito da figura, o amper\u00edmetro e o volt\u00edmetro s\u00e3o ideais. O volt\u00edmetro marca 1,5V quando a chave K est\u00e1 aberta.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Fechando a chave K, o amper\u00edmetro marcar\u00e1:<\/b><\/span><\/span><\/p>\n

a) 0mA\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) 7,5mA\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) 15mA\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) 100mA\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) 200mA<\/b><\/span><\/span><\/p>\n

 <\/p>\n

11-(ITA-SP)<\/b><\/span><\/span><\/span> No circuito desenhado abaixo, h\u00e1 duas pilhas de 1,5V cada, de resist\u00eancias internas desprez\u00edveis, ligaas em s\u00e9rie, fornecendo corrente para tr\u00eas resistores com os valores indicados. Ao circuito est\u00e3o ligados ainda um volt\u00edmetro e um amper\u00edmetro de resist\u00eancias internas, respectivamente, muito alta e muito baixa.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Quais as leituras desses instrumentos?<\/b><\/span><\/span><\/p>\n

 <\/p>\n

12-(UFF-RJ)<\/b><\/span><\/span><\/span> No circuito esquematizado na figura, a alimenta\u00e7\u00e3o \u00e9 feita por uma pilha de fem igual a 1,5V e resist\u00eancia interna desprez\u00edvel; os medidores de corrente (amper\u00edmetro A) e de tens\u00e3o (volt\u00edmetro V) s\u00e3o ideais.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Nesta situa\u00e7\u00e3o, as leituras do amper\u00edmetro e do volt\u00edmetro s\u00e3o, respectivamente:<\/b><\/span><\/span><\/p>\n

a) 0,05 A e 0,60V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) 0,10 A e 0,90V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) 0,15 A e 0,90V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) 0,20 A e 0,60V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) 0,30 A e 0,30V<\/b><\/span><\/span><\/p>\n

 <\/p>\n

13-(UNICAMP-SP)<\/b><\/span><\/span><\/span> No circuito da figura, A \u00e9 um amper\u00edmetro de resist\u00eancia nula e V um volt\u00edmetro de resist\u00eancia infinita. A resist\u00eancia interna da bateria \u00e9 nula.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) Qual \u00e9 a intensidade da corrente medida pelo amper\u00edmetro?<\/b><\/span><\/span><\/p>\n

b) Qual \u00e9 a voltagem medida pelo volt\u00edmetro?<\/b><\/span><\/span><\/p>\n

c) Quais s\u00e3o os valores das resist\u00eancias R<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>?<\/b><\/span><\/span><\/p>\n

d) Qual \u00e9 a pot\u00eancia fornecida pela bateria?<\/b><\/span><\/span><\/p>\n

 <\/p>\n

14-(Fatec-SP)<\/b><\/span><\/span><\/span> No circuito, o amper\u00edmetro A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>indica uma corrente de 200 mA.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

De acordo com o esquema, determine a indica\u00e7\u00e3o do amper\u00edmetro A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/sub><\/span>e a fem E do gerador.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

15- (PUC-SP)<\/b><\/span><\/span><\/span> No circuito esquematizado na figura, duas pilhas id\u00eanticas de for\u00e7a eletromotriz 1,5 V est\u00e3o associadas a tr\u00eas resistores: R<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>de 1,0 \u2126, R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>de resist\u00eancia n\u00e3o conhecida e R<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>de 2,0 \u2126. Para a montagem representada, a leitura do amper\u00edmetro ideal \u00e9 1,2A e o volt\u00edmetro, colocado em paralelo a R<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>\u00e9 ideal.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

O valor da resist\u00eancia do resistor R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>, em ohm, e a leitura do volt\u00edmetro, em volt, s\u00e3o respectivamente iguais a<\/b><\/span><\/span><\/p>\n

a) 1,0 e 2,4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) 2,0 e 0,8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) 2,0 e 2,4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) 1,0 e 0,8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) 1,2 e 2,4<\/b><\/span><\/span><\/p>\n

 <\/p>\n

16-(UFRJ-RJ)<\/b><\/span><\/span><\/span> O circuito da figura 1 mostra uma bateria ideal que mant\u00e9m uma diferen\u00e7a de potencial de 12 V entre seus terminais, um amper\u00edmetro tamb\u00e9m ideal e duas l\u00e2mpadas acesas de resist\u00eancias R<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>. Nesse caso, o amper\u00edmetro indica uma corrente de intensidade 1,0 A.<\/b><\/span><\/span><\/p>\n

Na situa\u00e7\u00e3o da figura 2, a l\u00e2mpada de resist\u00eancia R\u201a continua acesa e a outra est\u00e1 queimada. Nessa nova situa\u00e7\u00e3o, o amper\u00edmetro indica uma corrente de intensidade 0,40 A.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Calcule as resist\u00eancias R<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

17-(UNIFESP-SP)<\/b><\/span><\/span><\/span> A montagem experimental representada na figura se destina ao estudo de um circuito el\u00e9trico simples.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) Usando s\u00edmbolos convencionais para cada componente, represente esquematicamente esse circuito.<\/b><\/span><\/span><\/p>\n

b) Sabendo que R<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>= 100 \u2126 e R<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>= 200 \u2126 e que no suporte de pilhas s\u00e3o colocadas duas pilhas em s\u00e9rie, de for\u00e7a eletromotriz 1,5 V cada, determine as leituras no amper\u00edmetro e no volt\u00edmetro quando a chave \u00e9 fechada. (Admita que as resist\u00eancias internas das pilhas, dos fios de liga\u00e7\u00e3o e dos medidores n\u00e3o interferem nessas leituras.)<\/b><\/span><\/span><\/p>\n

 <\/p>\n

18- (UFC-CE))<\/b><\/span><\/span><\/span> No circuito esquematizado adiante, A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>s\u00e3o amper\u00edmetros ideais. Ligando-se a chave C, observa-se que:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) a leitura de A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e a leitura de A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>n\u00e3o mudam.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) a leitura de A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>diminui e a leitura de A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>aumenta.<\/b><\/span><\/span><\/p>\n

c) a leitura de A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>n\u00e3o muda e a leitura de A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>diminui.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) a leitura de A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>aumenta e a leitura de A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>diminui.<\/b><\/span><\/span><\/p>\n

e) a leitura de A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>aumenta e a leitura de A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>n\u00e3o muda.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

19-(UFF-RJ)<\/b><\/span><\/span><\/span> As extremidades de dois cilindros condutores id\u00eanticos, de resist\u00eancia R, est\u00e3o ligadas, por fios de resist\u00eancia desprez\u00edvel, aos terminais de uma fonte de for\u00e7a eletromotriz E = 12 V e resist\u00eancia interna r = 0,50 \u2126, conforme mostra o esquema a seguir. Em um dos ramos est\u00e1 ligado um amper\u00edmetro ideal A.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Sabendo que o amper\u00edmetro fornece uma leitura igual a 2,0 A, determine:<\/b><\/span><\/span><\/p>\n

a) a diferen\u00e7a de potencial el\u00e9trico entre os pontos P e Q, identificados na figura<\/b><\/span><\/span><\/p>\n

b) a resist\u00eancia el\u00e9trica R do cilindro<\/b><\/span><\/span><\/p>\n

 <\/p>\n

20- (MACK-SP)<\/b><\/span><\/span><\/span> Quatro l\u00e2mpadas, associadas de acordo com o esquema, apresentam as seguintes inscri\u00e7\u00f5es nominais:<\/b><\/span><\/span><\/p>\n

L<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/span><\/sub>: (10 W, 20 V)\u00a0 L<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/span><\/sub>: (20 W, 20 V) \u00a0L<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/span><\/sub>: (5 W, 10 V)\u00a0 L<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/span><\/sub>: (10 W, 10 V)<\/b><\/span><\/span><\/span><\/p>\n

Ao ligarmos a chave K, observaremos que:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) nenhuma l\u00e2mpada se \u201cqueimar\u00e1\u201d e o amper\u00edmetro ideal acusar\u00e1 a passagem de corrente de intensidade 1 A<\/b><\/span><\/span><\/p>\n

b) nenhuma l\u00e2mpada se \u201cqueimar\u00e1\u201d e o amper\u00edmetro ideal acusar\u00e1 a passagem de corrente de intensidade 4,5 A<\/b><\/span><\/span><\/p>\n

c) nenhuma l\u00e2mpada ir\u00e1 acender, pois foram ligadas fora da especifica\u00e7\u00e3o do fabricante<\/b><\/span><\/span><\/p>\n

d) as l\u00e2mpadas L<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e L<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>se \u201cqueimar\u00e3o\u201d<\/b><\/span><\/span><\/p>\n

e) as l\u00e2mpadas L<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e L<\/b><\/span><\/span>4<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>se \u201cqueimar\u00e3o\u201d<\/b><\/span><\/span><\/p>\n

 <\/p>\n

21-(UNESP-SP)<\/b><\/span><\/span><\/span> Um estudante utiliza-se das medidas de um volt\u00edmetro V e de um amper\u00edmetro A para calcular a resist\u00eancia el\u00e9trica de um resistor e a pot\u00eancia dissipada nele. As medidas de corrente e voltagem foram realizadas utilizando o circuito da figura.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

O amper\u00edmetro indicou 3 mA e o volt\u00edmetro 10 V. Cuidadoso, ele lembrou-se de que o volt\u00edmetro n\u00e3o \u00e9 ideal e que \u00e9 preciso considerar o valor da resist\u00eancia interna do medidor para se calcular o valor da resist\u00eancia R. Se a especifica\u00e7\u00e3o para a resist\u00eancia interna do aparelho \u00e9 10 k\u2126, calcule<\/b><\/span><\/span><\/p>\n

a) o valor da resist\u00eancia R obtida pelo estudante.<\/b><\/span><\/span><\/p>\n

b) a pot\u00eancia dissipada no resistor.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

22-(UFSCAR-SP)<\/b><\/span><\/span><\/span> No circuito abaixo, os amper\u00edmetros A<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e A<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>acusam, respectivamente, correntes i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

As correntes i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>s\u00e3o:<\/b><\/span><\/span><\/p>\n

a) i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=4,25.E\/R; i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>=E\/3R\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=4E\/R; i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>=E\/R\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=E\/4,25R; i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>=E\/3R\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=4,25E\/R; i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>=3.E\/R\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) i<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>=E\/R; i<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>=0,25.E\/R<\/b><\/span><\/span><\/p>\n

 <\/p>\n

23-(UFMG-MG)<\/b><\/span><\/span><\/span> Observe este circuito, constitu\u00eddo de tr\u00eas resistores de mesma resist\u00eancia R; um amper\u00edmetro A; uma bateria \u03b5; e um interruptor S:<\/b><\/span><\/span><\/p>\n

Considere que a resist\u00eancia interna da bateria e a do amper\u00edmetro s\u00e3o desprez\u00edveis e que os resistores s\u00e3o \u00f4hmicos. Com o interruptor S inicialmente desligado, observa-se que o amper\u00edmetro indica uma corrente el\u00e9trica I.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

\u00a0Com base nessas informa\u00e7\u00f5es, \u00e9 CORRETO afirmar que, quando o interruptor S \u00e9 ligado, o amper\u00edmetro passa a indicar uma corrente el\u00e9trica<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

24-(UFMS-MS)<\/b><\/span><\/span><\/span> No circuito abaixo, cada resistor tem resist\u00eancia (R).<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Considere as alternativas:<\/b><\/span><\/span><\/p>\n

I. A resist\u00eancia equivalente entre A e B \u00e9 (5\/8)R.<\/b><\/span><\/span><\/p>\n

II. A resist\u00eancia equivalente entre A e C \u00e9 (5\/8)R<\/b><\/span><\/span><\/p>\n

III. A resist\u00eancia equivalente entre A e D \u00e9 (R)<\/b><\/span><\/span><\/p>\n

IV. A resist\u00eancia equivalente entre B e C \u00e9 (1\/2)R<\/b><\/span><\/span><\/p>\n

V. A resist\u00eancia equivalente entre C e D \u00e9 (5\/8)R<\/b><\/span><\/span><\/p>\n

\u00c9 correto afirmar que:<\/b><\/span><\/span><\/p>\n

a) apenas a afirmativa I est\u00e1 correta\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) apenas as afirmativas I e II est\u00e3o corretas\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

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

d) apenas as afirmativas IV e V est\u00e3o corretas\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) todas est\u00e3o corretas<\/b><\/span><\/span><\/p>\n

 <\/p>\n

25-(UEG-GO)<\/b><\/span><\/span><\/span> Um circuito simples \u00e9 composto apenas por uma bateria (B) e uma l\u00e2mpada (L). Com esse circuito el\u00e9trico, um estudante montou quatro conex\u00f5es diferentes, com um mesmo medidor de<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

intensidade de corrente el\u00e9trica, conhecido como amper\u00edmetro (A). Ap\u00f3s as montagens, conforme a figura acima, o estudante apresentou vers\u00f5es das conex\u00f5es realizadas. Em qual dessas vers\u00f5es o amper\u00edmetro ir\u00e1 fornecer a leitura real da intensidade de corrente no circuito?<\/b><\/span><\/span><\/p>\n

a) A conex\u00e3o 1 apresenta uma maneira correta de se ler a corrente el\u00e9trica em um circuito; nesse caso, optou-se por colocar o amper\u00edmetro do lado esquerdo da bateria.<\/b><\/span><\/span><\/p>\n

b) A conex\u00e3o 2 fornece uma leitura menor que a da conex\u00e3o 1, j\u00e1 que parte da corrente el\u00e9trica dissipou-se ao percorrer todo o circuito.<\/b><\/span><\/span><\/p>\n

c) A conex\u00e3o 3 \u00e9 melhor que as conex\u00f5es 1 e 2, pois esse procedimento fez com que somente a leitura da corrente el\u00e9trica percorrida na l\u00e2mpada fosse mensurada.<\/b><\/span><\/span><\/p>\n

d) A conex\u00e3o 4 \u00e9 quase id\u00eantica \u00e0 conex\u00e3o 3 e, portanto, fornecer\u00e1 a real leitura da corrente el\u00e9trica percorrida na l\u00e2mpada e tamb\u00e9m na pilha.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

26-(UFRGS-RS)<\/b><\/span><\/span><\/span>\u00a0 Volt\u00edmetros e amper\u00edmetros s\u00e3o os instrumentos mais usuais para medi\u00e7\u00f5es el\u00e9tricas. Evidentemente, para a obten\u00e7\u00e3o de medidas corretas, esses instrumentos devem ser conectados de maneira adequada. Al\u00e9m disso, podem ser danificados se forem conectados de forma incorreta ao circuito.<\/b><\/span><\/span><\/p>\n

Suponha que se deseja medir a diferen\u00e7a de potencial a que est\u00e1 submetido o resistor R2 do circuito a seguir, bem como a corrente el\u00e9trica que o percorre.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Assinale a figura que representa a correta conex\u00e3o do volt\u00edmetro (V) e do amper\u00edmetro (A) ao circuito para a realiza\u00e7\u00e3o das medidas desejadas.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

 <\/p>\n

27-(UPE-PE)\u00a0<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros\u00a0\"Amper\u00edmetros\u00a0\"Amper\u00edmetros<\/p>\n

No circuito el\u00e9trico a seguir, est\u00e3o representados dois geradores id\u00eanticos, com E= 12 V e r = 1\u03a9. O amper\u00edmetro e o volt\u00edmetro<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

s\u00e3o ideais. Analise as proposi\u00e7\u00f5es a seguir e conclua.<\/b><\/span><\/span><\/p>\n

(\u00a0\u00a0\u00a0\u00a0 )\u00a0 A leitura do amper\u00edmetro \u00e9 de 2A.<\/b><\/span><\/span><\/p>\n

(\u00a0\u00a0\u00a0\u00a0 )\u00a0 A leitura do volt\u00edmetro \u00e9 de 10 V.<\/b><\/span><\/span><\/p>\n

(\u00a0\u00a0\u00a0\u00a0 )\u00a0 A resist\u00eancia equivalente do circuito \u00e9 de 12\u03a9.<\/b><\/span><\/span><\/p>\n

(\u00a0\u00a0\u00a0\u00a0 )\u00a0 A pot\u00eancia dissipada no resistor de 10\u03a9\u00e9 de 40 W.<\/b><\/span><\/span><\/p>\n

(\u00a0\u00a0\u00a0\u00a0 )\u00a0 O rendimento do gerador entre os pontos C e B \u00e9 de aproximadamente 83,33%.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

28-(UNIFEI-MG)<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros\u00a0\"Amper\u00edmetros\u00a0\"Amper\u00edmetros\u00a0\"Amper\u00edmetros<\/p>\n

Qual das duas montagens mostradas na figura abaixo deve ser usada para medir simultaneamente a queda de tens\u00e3o em uma resist\u00eancia R e a corrente que passa por ela se:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) R = 4,7 \u03a9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) R = 2,2 M \u03a9<\/b><\/span><\/span><\/p>\n

 <\/p>\n

29-(UFRJ-RJ)<\/b><\/span><\/span><\/span> Uma bateria ideal, um amper\u00edmetro de resist\u00eancia interna de 100 \u03a9 e um resistor de resist\u00eancia de 1.400 \u03a9 s\u00e3o ligados em s\u00e9rie em um circuito inicialmente aberto com terminais a e b, como indicado na figura a seguir.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Quando os terminais a e b s\u00e3o conectados por um fio de resist\u00eancia desprez\u00edvel, fechando o circuito, se estabelece no amper\u00edmetro uma corrente de 1,00mA. Quando os terminais a e b s\u00e3o conectados por um resistor, fechando o circuito, se estabelece no amper\u00edmetro uma corrente de 0,20mA.<\/b><\/span><\/span><\/p>\n

Calcule a resist\u00eancia desse resistor.<\/b><\/span><\/span><\/p>\n

 <\/p>\n

30-(MACKENZIE-SP)<\/b><\/span><\/span><\/span> Certo estudante disp\u00f5e de um volt\u00edmetro e de um amper\u00edmetro, ambos ideais, de um gerador el\u00e9trico (pilha), de resist\u00eancia interna 4,5\u03a9, e de uma l\u00e2mpada incandescente com as seguintes inscri\u00e7\u00f5es nominais: 1,0W \u2014 9,0V. Para que esses dispositivos sejam associados corretamente, proporcionando \u00e0 l\u00e2mpada o maior brilho poss\u00edvel, sem \u201cqueim\u00e1-la\u201d, o esquema que dever\u00e1 ser utilizado \u00e9 o ilustrado na _________ e a for\u00e7a eletromotriz do gerador dever\u00e1 ser ______.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

As lacunas, do texto anterior, s\u00e3o corretamente preenchidas com as afirma\u00e7\u00f5es<\/b><\/span><\/span><\/p>\n

a) FIGURA 1; 9,5V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) FIGURA 2; 9,5V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) FIGURA 3; 9,5V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) FIGURA 2; 9,0V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) FIGURA 3; 9,0V<\/b><\/span><\/span><\/p>\n

 <\/p>\n

31-(IME-RJ)<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

O valor da resist\u00eancia equivalente entre os terminais A e B do circuito mostrado na figura abaixo \u00e9:<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

a) R\/2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) 6R\/7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) 6R\/13\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) 16R\/29\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) 15R\/31<\/b><\/span><\/span><\/p>\n

 <\/p>\n

32-(PUC-RJ)<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

Calcule a corrente em amp\u00e8res medida no amper\u00edmetro (A) do circuito apresentado na figura.<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

\"\"<\/p>\n

\u00a033-(MACKENZIE-SP)<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

No circuito el\u00e9trico abaixo esquematizado, o gerador el\u00e9trico possui resist\u00eancia el\u00e9trica desprez\u00edvel. Tanto o amper\u00edmetro, quanto o volt\u00edmetro, s\u00e3o considerados ideais. As l\u00e2mpadas ilustradas s\u00e3o id\u00eanticas e trazem as informa\u00e7\u00f5es nominais<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

(1 W\u00a0 \u2014 10 V). Ap\u00f3s fechar-se a chave K, o amper\u00edmetro e o volt\u00edmetro indicar\u00e3o, respectivamente,<\/b><\/span><\/span><\/p>\n

a)\u00a0 50 mA e 1,25 V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b)\u00a0 25 mA e 1,25 V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c)\u00a0 50 mA e 2,50 V\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d)\u00a0 25 mA e 2,50 V \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e)\u00a0 75 mA e 5,00 V<\/b><\/span><\/span><\/p>\n

 <\/p>\n

34-(MACKENZIE-SP-012)<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

No laborat\u00f3rio de F\u00edsica, monta-se o circuito el\u00e9trico ao lado, com um gerador ideal e os interruptores (chaves) K<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>, K<\/b><\/span><\/span>2<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>e K<\/b><\/span><\/span>3<\/b><\/span><\/span><\/sub>. Estando<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

somente o interruptor K<\/b><\/span><\/span>1<\/b><\/span><\/span><\/sub>\u00a0<\/b><\/span><\/span><\/span>fechado, o amper\u00edmetro ideal acusa a passagem de corrente el\u00e9trica de intensidade 5 A. Fechando todos<\/b><\/span><\/span><\/p>\n

os interruptores, a pot\u00eancia gerada pelo gerador \u00e9<\/b><\/span><\/span><\/p>\n

a)\u00a0 300 W\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<\/b><\/span><\/span><\/p>\n

b)\u00a0 350 W\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c)\u00a0 400 W\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d)\u00a0 450 W\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e)\u00a0 500 W<\/b><\/span><\/span><\/p>\n

 <\/p>\n

35-(UENP-PR)<\/b><\/span><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

A partir do circuito el\u00e9trico abaixo, assinale a alternativa que indica, respectivamente, a leitura do amper\u00edmetro A (em A) e a do<\/b><\/span><\/span><\/p>\n

\"Amper\u00edmetros<\/p>\n

volt\u00edmetro (em V).<\/b><\/span><\/span><\/p>\n

a) 0,2 e 0,9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

b) 0,4 e 1,2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

c) 0,6 e 4,8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/p>\n

d) 0,8 e 3,6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0<\/b><\/span><\/span><\/p>\n

e) 1,0 e 9,0<\/b><\/span><\/span><\/p>\n

 <\/p>\n

Confira o gabarito e resolu\u00e7\u00e3o comentada<\/a>\u00a0<\/span><\/h3>\n

\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Exerc\u00edcios de vestibulares com resolu\u00e7\u00e3o comentada sobre Amper\u00edmetros e Volt\u00edmetros 01-(UFB) Para se determinar a resist\u00eancia R do circuito abaixo, utiliza-se dois aparelhos de medidas A e V. a) Q \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b) P \u00e9 um amper\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 c) P \u00e9 um amper\u00edmetro e Q \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 d) Q \u00e9 um amper\u00edmetro e P \u00e9 um volt\u00edmetro\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 e) nada<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1844,"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-1846","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1846","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=1846"}],"version-history":[{"count":5,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1846\/revisions"}],"predecessor-version":[{"id":10504,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1846\/revisions\/10504"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/1844"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=1846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}