The gold leaves of a gold-leaf electroscope are enclosed in a glass bottle

to protect the gold leaves from drafts of air.

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to protect the gold leaves from rusting.

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To protect the gold leaves from wear and tear.

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All of the above

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Solution

The correct option is A to protect the gold leaves from drafts of air.
It is used to protect the leaves from wind. Otherwise wind will create errors in the observation.

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The gold leaves of a gold-leaf electroscope are enclosed in a glass bottle

The correct option is A to protect the gold leaves from drafts of air.It is used to protect the leaves from wind. Otherwise wind will create errors in the observation.

The correct option is A to protect the gold leaves from drafts of air.
It is used to protect the leaves from wind. Otherwise wind will create errors in the observation.