What is the working principal of gold leaf electroscope?

INVENTOR OF THE GOLD-LEAF ELECTROSCOPE: Englishmen Sir Abraham Bennet (1786 Anno Domini) PRINCIPLE OF A GOLD-LEAF ELECTROSCOPE: A gold-leaf electroscope is a simple device which is used to identify the electric charge present in a body CONSTRUCTION OF A GOLD-LEAF ELECTROSCOPE: 1) A gold-leaf electroscope is a metallic disk attached to one end of a copper rod 2) To the other end of the copper rod, two thin gold metal leaves are attached. (Usually of gold. Can also be of another metal.) 3) The side of the copper rod with the thin gold leaves is fitted inside a conical flask, through a non-conducting rubber-cork 4) The thin gold leaves are used in a electroscope to make it more sensitive WORKING OF A GOLD-LEAF ELECTROSCOPE: 1) If an uncharged body is brought and touched on the metallic disk, we notice no change in the golden leaves 2) If a charged body (positively or negatively charged) is brought and touched to the metallic disk of the gold-leaf electroscope, it attains the same charge as that of the charged body touched to the metallic disk by the property of transmission of charges from one charged substance to another substance 3) Therefore, the golden leaves in the electroscope also attain like charges and diverge from each other due to the repulsion 4) The repulsion of the golden leaves in the electroscope is the test for finding out that whether a body is charged or not 5) If we touch any of the charged bodies, the charge escapes from our body directly to the earth through our legs 6) The charged body thus loses it's charge and becomes neutral.

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