1. A conductor cannot be charged by friction. Why
2. Give a diagram of charging a conduct(by conduction, induction,gold leaf electroscope).

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Refer to the link given below for an answer to a similar query for your Ist question :
https://www.meritnation.com/ask-answer/question/why-cant-metals-like-copper-be-charged-by-friction/some-natural-phenomena/3327648