
Revisão Circuitos Elétricos I - Avaliação 1
Authored by Marcelo Coutinho
Engineering
10th Grade
10 Questions
Used 2+ times

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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sobre a figura, assinale a alternativa correta:
A potência em (a) e (b) é a mesma e vale -12W.
As potências em (a) e em (b) são diferentes.
A potência em (b) vale 12W.
A potência em (a) vale -12W porque o elemento absorve energia.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Qual a energia consumida por uma lâmpada de 100W durante duas horas ?
720 joules
50 Wh
0,2 kWh
100 Wh
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Qual a resistência de um fio condutor se sua resistividade vale 0,0172 Ω.mm2/m, comprimento 10m e área transversal 7mm2 ?
Não é possível calcular a resistência com esses dados.
0,01 Ω
0,02 Ω
0,7 Ω
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A tensão 2.000.000 V pode ser expressa como:
2 mV
2 kV
2 MV
2 GV
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A carga total que atravessaria um elemento em t=2s, caso a corrente fosse aquela mostrada na figura, vale:
17,5 A/s
17,5 C
10 As
7,5 As
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A potência no resistor do circuito vale:
30 W
3,33 W
0,9 mW
90 mW
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
A corrente indicada no circuito vale:
30/17 A
2 A
10/7 A
10/8 A
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