Encceja Ensino Médio Practice Questions - Exame Nacional Para Certificação De Competências De Jovens E Adultos - Ensino Médio Exam

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A resident decides to install decorative lighting in their backyard. If they connect three identical 127 V light bulbs in series across a 127 V household power source instead of connecting them in parallel, what will be the observed operational outcome?

Each bulb will receive 127 V and shine with its maximum rated brightness. The bulbs will immediately burn out because the total electric current will triple. Two bulbs will shine normally, but the third bulb will receive no electrical current. Each bulb will receive approximately 42.3 V (one-third of the voltage) and will glow very dimly; if one bulb is removed, all three will turn off.

Correct Answer:

Each bulb will receive approximately 42.3 V (one-third of the voltage) and will glow very dimly; if one bulb is removed, all three will turn off.

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