Siti tested four materials (W, X, Y, Z) in a circuit. The bulb only lit up when materials W and Y were used. Which of the following is a possible conclusion?
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Worked Solution
Step 1: A bulb lights up only when the circuit is closed by a conductor.
Step 2: W and Y allowed the bulb to light, so they are conductors.
Step 3: X and Z did not, so they are insulators.
Correct answer: Materials W and Y are electrical conductors.
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