A positively charged electroscope is brought near a rod. The leaf first falls then rises as the rod approaches. What is the rod's charge?
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The rod is positive. Initially, it repels positive charges, causing leaf to fall (less positive). As it gets closer, induction causes more charge separation and the leaf rises again.…
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Full Explanation
The rod is positive. Initially, it repels positive charges, causing leaf to fall (less positive). As it gets closer, induction causes more charge separation and the leaf rises again.