Ravi tested four objects, W, X, Y, and Z, by placing them in a circuit. The bulb only lit up when W and Y were used. Which of the following are insulators?
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Worked Solution
Step 1: A bulb lights only if the object is an electrical conductor.
Step 2: W and Y are conductors.
Step 3: X and Z did not allow the bulb to light, so they are insulators.
Correct answer: X and Z
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