
Potência e Energia Elétrica
Authored by Prof. Fábio
Physics
3rd Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a unidade SI (Sistema Internacional) de potência elétrica?
Volts (V)
Ohms (Ω)
Ampères (A)
Watts (W)
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A potência elétrica é definida como:
A taxa de variação da carga elétrica.
A quantidade total de energia elétrica consumida no tempo.
A taxa de transferência de energia elétrica.
A medida da resistência elétrica em um circuito.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Um dispositivo consome uma corrente de 2 A a uma tensão de 120 V. Qual é a potência consumida pelo dispositivo?
240 W
60 W
0,0167 W
15 W
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A energia elétrica total consumida por um aparelho é medida em:
Volts (V)
Ohms (Ω)
Ampères-hora (Ah)
Watts-hora (Wh)
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Qual é a fórmula para calcular a energia elétrica consumida por um aparelho ao longo do tempo?
E = P.t
E = I.U
E = P/t
E = U^2/R
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Um chuveiro elétrico opera a uma potência de 3000 W. Quanto tempo ele levaria para consumir 15.000 Wh de energia?
0,05 h
5 h
50 h
500 h
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual é a relação entre potência, corrente elétrica e tensão em um circuito?
P = I/U
P = U/I
P = I + U
P = U.i
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