Standard Science Primary 6 Energy

Look at the two circuits below. If all batteries and bulbs are identical, which statement is true?

A No bulbs will light up in Circuit 2.
B Bulbs in Circuit 2 are brighter than Circuit 1.
C All bulbs have the same brightness.
D Bulbs in Circuit 1 are brighter than Circuit 2.
Show Worked Solution

Worked Solution

Step 1: Circuit 1 has bulbs in series; Circuit 2 has them in parallel. Step 2: In parallel, each bulb receives the full voltage of the battery. Step 3: Parallel bulbs shine brighter than series bulbs.

Correct answer: Bulbs in Circuit 2 are brighter than Circuit 1.

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