Siti set up a circuit with a battery, a bulb, and a gap. She placed four different materials, P, Q, R, and S, across the gap one at a time. The bulb only lit up when materials Q and S were used. Which of the following are most likely materials Q and S?
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Worked Solution
Step 1: The bulb lights up only if the material is an electrical conductor.
Step 2: Metals like Copper, Steel, Aluminum, and Silver are conductors.
Step 3: Option B contains two metals (Copper and Steel).
Correct answer: Q: Copper; S: Steel
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