Standard Science Primary 5 Systems

Siti set up the circuit shown below. When she closed the switch, she noticed that only Bulb B1 lighted up. What could be the possible reason?

A Bulb B2 is fused.
B The wires are made of copper.
C The switch is broken.
D The batteries are flat.
Show Worked Solution

Worked Solution

Step 1: Identify the circuit type. This is a parallel circuit. Step 2: In a parallel circuit, bulbs are on separate paths. Step 3: If one bulb is fused, the other path remains a closed circuit and can still light up. Step 4: Therefore, B2 is fused.

Correct answer: Bulb B2 is fused.

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