Advanced Science Primary 5 Systems

In a mixed circuit, two bulbs are in parallel and connected in series with a battery and a third bulb. What happens to the other two bulbs if the series bulb fuses?

A One stays lit, one goes out.
B They both become brighter.
C They both go out.
D They both stay lit.
Show Worked Solution

Worked Solution

Step 1: The series bulb is on the main loop. Step [2-9]: If it fuses, the main loop is broken (Open Circuit). Step [2-9]: Current cannot reach the parallel branches.

Correct answer: They both go out.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free