
Quiz sobre LEDs e Semáforos
Authored by WALBER ALVES
Other
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a principal função de um LED em circuitos eletrônicos?
Emitir luz quando uma corrente elétrica passa por ele
Armazenar energia elétrica
Controlar a tensão em um circuito
Converter energia elétrica em energia térmica
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das seguintes opções é uma aplicação comum de LEDs?
Resistores de potência
Iluminação de ambientes
Transformadores de tensão
Capacitores de filtro
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Em um circuito com LEDs, qual componente é frequentemente usado para limitar a corrente que passa pelo LED?
Capacitor
Indutor
Resistor
Diodo
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a cor de um LED que emite luz com o menor comprimento de onda?
Vermelho
Verde
Azul
Amarelo
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a função principal de um semáforo em um cruzamento?
Medir a velocidade dos veículos
Controlar o fluxo de tráfego
Fornecer iluminação pública
Monitorar a qualidade do ar
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual componente é essencial para controlar a sequência de luzes em um semáforo usando um Arduino?
Sensor de temperatura
Potenciômetro
Relé
Microcontrolador
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