
Eletricidade
Authored by Isabelle Krueger
Physics
9th - 12th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A unidade de medida da corrente elétrica no SI é:
Ohm (Ω)
Volt (V)
Ampère (A)
Watt (W)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das opções representa corretamente a 1ª Lei de Ohm?
R=U/i
U=i/R
i=R.U
U=R/i
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A resistência elétrica de um fio depende de:
Tensão e corrente
Comprimento, área e material do fio
Potência dissipada
Material do fio e corrente elétrica
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se dobrarmos a resistência de um circuito e mantivermos a tensão constante, a corrente:
Dobra
Fica igual
Diminui pela metade
Triplica
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Um chuveiro elétrico opera com 220 V e consome 4400 W. Qual é a corrente elétrica nele?
10 A
20 A
30 A
40 A
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual alternativa representa uma fonte de tensão elétrica?
Geladeira
Lâmpada
Pilha
Resistor
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Corrente contínua (CC) é aquela que:
Alterna sua direção
É gerada apenas por usinas hidrelétricas
Flui sempre no mesmo sentido
Não realiza trabalho
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