Standard Science Primary 6 Energy

Siti set up a circuit with a battery, a switch, and two bulbs. When she closed the switch, only one bulb lit up. Which of the following is the most likely reason?

A The battery was flat.
B The wires were made of copper.
C One of the bulbs was fused.
D The switch was faulty.
Show Worked Solution

Worked Solution

Step 1: Identify that the circuit is closed (switch is pressed). Step 2: If one bulb lights up, the battery and switch are functional. Step 3: A fused bulb in a parallel branch (or a specific fault) would allow the other to stay lit. Step 4: Final Answer: One bulb was fused.

Correct answer: One of the bulbs was fused.

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