Standard Science Primary 6 Energy

Siti set up the circuit shown below. When she closed the switch, only one bulb lit up. Which of the following could be the reason?

A The wires are made of copper.
B The batteries are facing opposite directions.
C The switch is made of iron.
D One of the bulbs is fused.
Show Worked Solution

Worked Solution

Step 1: Analyze the circuit diagram (parallel arrangement). Step 2: In a parallel circuit, if one bulb is fused, the other can still light up as there is another path for electricity. Step 3: This explains why only one bulb lit up.

Correct answer: One of the bulbs is fused.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free