Standard Science Primary 6 Energy

Siti set up the circuit below. However, the bulb did not light up even though the batteries and bulb were new. What could be the reason?

A There are too many bulbs in the circuit.
B The batteries are arranged in series.
C The switch is closed.
D One of the wires is connected to an insulator.
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Worked Solution

Step 1: For a bulb to light, there must be a closed loop of conductors. Step 2: If components are working but it fails, there is a break or an insulator in the path. Step 3: An insulator prevents current flow.

Correct answer: One of the wires is connected to an insulator.

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