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Question
The medium used in the jar of electroscope is:
The medium used in the jar of electroscope is:
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Solution
The correct option is A Vacuum
When the electroscope is given a charge, its leaves diverge and hence, charge is detected. It is desired that the leaves remain divergent even after the charge is removed. For this, they should be able to retain the charge. Hence, the material in the jar of electroscope should be an insulator. Vacuum is a good electrical insulator and hence, vacuum is maintained in the jar during the experiment.
When the electroscope is given a charge, its leaves diverge and hence, charge is detected. It is desired that the leaves remain divergent even after the charge is removed. For this, they should be able to retain the charge. Hence, the material in the jar of electroscope should be an insulator. Vacuum is a good electrical insulator and hence, vacuum is maintained in the jar during the experiment.
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