
Potência Elétrica B
Authored by JOHNNI PADILHA
Physics
3rd Grade
Used 2+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um chuveiro elétrico tem uma potência de 5500 W e é utilizado por 30 minutos. Qual o consumo de energia em kWh?
2,75 kWh
1,83 kWh
4,5 kWh
0,46 kWh
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Um aparelho de 1200 W fica ligado por 3 horas. Qual é o consumo de energia, em quilowatt-hora?
2,6 kWh
1,2 kWh
3,6 kWh
4,8 kWh
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual a relação entre quilowatt-hora (kWh) e joules (J)?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual a potência de um equipamento que consome 6 kWh de energia ao longo de 2 horas?
2 kW
4 kW
3 kW
6 kW
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Um aquecedor elétrico de potência nominal 1200 W permanece ligado 5 horas por dia. Sabendo que o custo do kWh é de R$ 0,40, durante 1 mês (30 dias) qual seria o gasto com o aquecedor?
R$ 180,00
R$ 55,00
R$ 72,00
R$ 12,00
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Determine a tensão elétrica em um circuito que possui um resistor de 40 Ω e que apresenta uma potência elétrica de 250 W.
90 V
100 V
120 V
130 V
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual a resistência elétrica de um resistor que é atravessado por uma corrente de 5 A e que dissipa uma potência de 1000 W?
70 Ω
60 Ω
50 Ω
40 Ω
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