Standard Science Primary 6 Energy

Siti set up a circuit with three bulbs. When she unscrewed one bulb, the other two remained lit. Which of the following describes the circuit arrangement?

A All bulbs were arranged in parallel.
B Two bulbs were in series, and one was in parallel.
C The battery was flat.
D All bulbs were arranged in series.
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Worked Solution

Step 1: Identify the observation (one out, others stay lit). Step 2: Recall that in a parallel arrangement, there are multiple paths for electricity. Step 3: Unscrewing one bulb in parallel does not break the path for the others.

Correct answer: All bulbs were arranged in parallel.

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