
Grandezas elétricas
Authored by Francisco Piteira
Science
12th Grade
Used 3+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
O que representa a tensão elétrica num circuito?
A taxa de consumo de energia elétrica
A diferença de potencial elétrico entre dois pontos do circuito
A oposição ao fluxo de corrente
A quantidade de eletricidade produzida
2.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
Qual é a unidade de medida da corrente elétrica e o que ela representa?
Amperes (A), e representa a resistência do circuito
Ohms (Ω), e representa a tensão do circuito
Amperes (A), e representa o fluxo de eletrões no circuito
Watts (W), e representa a potência consumida
3.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
Como se calcula a potência elétrica consumida num circuito?
P = V/I
P = V x I
P = R x I
P = V² / R
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Qual é o objetivo principal de aumentar a eficiência num processo de eletrólise?
Reduzir o consumo de energia.
Melhorar a qualidade dos elétrodos.
Aumentar a produção de calor.
diminuir a quantidade de matéria formada
5.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
Qual das opções a seguir descreve corretamente a resistência elétrica?
A taxa de eletricidade produzida em um processo
A diferença de potencial entre dois pontos do circuito
A oposição ao fluxo de corrente, medida em ohms (Ω)
A capacidade do sistema de manter uma corrente constante
6.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
O que ocorre num circuito elétrico quando a resistência aumenta, mantendo a tensão constante?
A corrente aumenta.
A corrente diminui.
A potência elétrica aumenta.
A tensão também aumenta.
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