When a hard rubber rod is given a negative charge by rubbing it with wool:

positive charges are transferred from rod to wool

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negative charges are transferred from rod to wool

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positive charges are transferred from wool to rod

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negative charges are transferred from wool to rod

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Solution

The correct option is D
negative charges are transferred from wool to rod

The electrons on the rubber rod will give it a negative charge.

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When a hard rubber rod is given a negative charge by rubbing it with wool:

The correct option is D negative charges are transferred from wool to rod The electrons on the rubber rod will give it a negative charge.

The correct option is D
negative charges are transferred from wool to rod

The electrons on the rubber rod will give it a negative charge.