Standard Science Primary 6 Energy

Jun Jie has two identical circuits. Circuit A has 2 bulbs in series, and Circuit B has 2 bulbs in parallel. Which statement is correct?

A If one bulb in A fuses, the other stays lit.
B Bulbs in A are brighter than B.
C Bulbs in B are brighter than A.
D If one bulb in B fuses, both go out.
Show Worked Solution

Worked Solution

Step 1: In a parallel circuit (B), each bulb receives the full voltage of the battery. Step 2: In a series circuit (A), bulbs share the voltage. Step 3: Therefore, bulbs in parallel are brighter than those in series.

Correct answer: Bulbs in B are brighter than A.

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

Start Free Trial — 7 Days Free