What is an electroscope ? Draw a labelled diagram of gold-leaf elecrtroscope and write its uses.
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Answer:
electroscope
electroscopean instrument for detecting and measuring electricity, especially as an indication of the ionization of air by radioactivity.
Explanation:
- It consists of a vertical metal rod, usually brass, from the end of which hang two parallel strips of thin flexible gold leaf.
- A disk or ball terminal is attached to the top of the rod, where the charge to be tested is applied.
- To protect the gold leaves from drafts of air they are enclosed in a glass bottle, usually open at the bottom and mounted over a conductive base.
- Often there are grounded metal plates or foil strips in the bottle flanking the gold leaves on either side.
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