Standard Science Primary 6 Energy

Siti set up two circuits, A and B. In Circuit A, the bulbs are arranged in series. In Circuit B, the bulbs are arranged in parallel. If one bulb in each circuit fuses, what will happen to the other bulbs?

A All bulbs in both circuits will go out.
B The other bulbs in Circuit A will stay lit, but those in Circuit B will go out.
C All bulbs in both circuits will stay lit.
D The other bulbs in Circuit A will go out, but those in Circuit B will stay lit.
Show Worked Solution

Worked Solution

Step 1: Identify that Circuit A is series (single path). If one bulb fuses, the circuit is broken. Step 2: Identify that Circuit B is parallel (multiple paths). If one bulb fuses, current can still flow through other branches. Step 3: Therefore, A goes out and B stays lit.

Correct answer: The other bulbs in Circuit A will go out, but those in Circuit B will stay lit.

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

Start Free Trial — 7 Days Free