Siti set up an electrical circuit to test different materials. She placed each material across the gap in the circuit. For which material will the bulb light up?
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Worked Solution
Step 1: For the bulb to light up, the material must be an electrical conductor.
Step 2: Wood, glass, and plastic are insulators (poor conductors of electricity).
Step 3: Iron is a metal and is a good conductor of electricity.
Correct answer: Iron nail
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