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Explain why, a glass rod can be charged by rubbing when held by hand. - Questions and Answers
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Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing, if held by hand?

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Ans. Because glass rod is an insulator, so charge developed on it during rubbing does not flow to the ground through the hand holding it. However, iron rod is a conductor and charge developed on it during rubbing can easily flow to the ground through the hand holding it. For this reason all metal objects used in electrostatic have insulating handles or stands.
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