Siti set up an electrical circuit but left a gap between points X and Y. She tested four different materials by placing them across the gap. Which material will cause the bulb to light up?
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Worked Solution
Step 1: For the bulb to light up, the circuit must be closed.
Step 2: This requires an electrical conductor to bridge the gap.
Step 3: Metals like copper are good conductors of electricity.
Correct answer: A copper coin
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