
Leis de Kirchhoff
Authored by IAGO PEREIRA
Physics
Professional Development
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9 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
De acordo com o nó mostrado no diagrama, a corrente I deve ser: c
0
1 A
2 A
3 A
4 A
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
O circuito mostrado na figura é formado por uma bateria
(B) e cinco lâmpadas (d). O número junto a cada lâmpada
indica a corrente que passa pela lâmpada, em ampères. Qual é a corrente que passa pelo ponto X?
4A
10A
15A
19A
34A
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
No circuito abaixo, os geradores são ideais, as correntes
elétricas têm os sentidos indicados e i1 = 1A. O valor da
resistência R é:
3
6
9
15
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
De acordo com a figura, os valores das correntes elétricas i1, i2 e i₃ são, respectivamente, iguais a:
-2,0 A, 3,0 A, 5,0 A
2,0 A, 3,0 A, 5,0 A
3,0 A, 2,0 A, 5,0 A
5,0 A, 3,0 A, 8,0 A
2,0 A, -3,0 A, -5,0 A
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
O desenho abaixo representa um circuito elétrico composto por resistores ôhmicos, um gerador ideal e um receptor ideal. A potência elétrica dissipada no resistor de 4 Ω do circuito é:
0,16W
0,20W
0,40W
0,72W
0,80W
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Em um nó a soma das correntes que entram é igual:
Ao produto das correntes que saem do nó
A subtração das correntes que saem do nó
Produto entre os nós do circuito
Soma das correntes que saem do nó
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
De acordo com a segunda lei de kirchhoff:
Somatório das tensão em uma malha é igual a 1
Somatório das tensão em uma malha é igual a zero
Somatório das tensão em uma malha é igual a das tensões dos nós
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