Standard Science Primary 5 Systems

Alexa connects three identical bulbs in a series circuit and another three identical bulbs in a parallel circuit using the same type of batteries. Which statement is TRUE?

A All bulbs will have the same brightness.
B The batteries in the parallel circuit will last longer.
C The bulbs in the parallel circuit will be brighter.
D The bulbs in the series circuit will be brighter.
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Worked Solution

Step 1: In a series circuit, the electrical energy from the battery is shared among the bulbs, so they appear dimmer. Step 2: In a parallel circuit, each branch receives the full voltage of the battery. Step 3: Therefore, the bulbs in the parallel circuit will be brighter than those in the series circuit.

Correct answer: The bulbs in the parallel circuit will be brighter.

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