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A positively charged rod is brought near an uncharged conductor. If the rod is then suddenly withdrawn, the charge left on the conductor will be :
- positive
- negative
- zero
- data insufficient
Correct answer: negative
Solution
A positively charged rod attracts electrons toward the near side of the uncharged conductor, leaving the far side relatively positive. If the rod is withdrawn without grounding or contact, the separated charges redistribute and the conductor returns to having zero net charge, so the stated answer would not follow from ideal induction alone.
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