Ravi set up a circuit with a gap. He wants to test which material allows the bulb to light up. Which of the following materials should he place in the gap?
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Worked Solution
Step 1: To light the bulb, the circuit must be closed.
Step 2: This requires an electrical conductor to bridge the gap.
Step 3: Metals are good electrical conductors. An iron nail is made of metal.
Step 4: Wood, plastic, and glass are electrical insulators.
Correct answer: An iron nail
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