Standard Science Primary 5 Systems

Siti compared two circuits. Setup A has two bulbs in series, while Setup B has two bulbs in parallel. Both setups use identical batteries and bulbs. Which statement is correct?

A The bulbs in Setup B are brighter than Setup A.
B The bulbs in both setups have the same brightness.
C The bulbs in Setup A are brighter than Setup B.
D The batteries in Setup B will last longer than Setup A.
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Worked Solution

Step 1: In a series circuit, current flows through a single path, sharing energy between bulbs. Step 2: In a parallel circuit, each bulb is on its own branch and receives the full voltage of the battery. Step 3: Therefore, bulbs in parallel (Setup B) are brighter.

Correct answer: The bulbs in Setup B are brighter than Setup A.

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