There was an experiment an here is the purpose: to determine re charge that is induced on a metal leaf electroscope when it is approvhed by known charges.
I've answered all my analyisis questions except for this one: explain how you were able to determine the charge on the ebonite rod and the acetate rods.
The Attempt at a Solution
I knew that If I rubbed fur on the ebonite rod, it would become negative and if I rub silk on the acetate rod, it will become positive, but I have no clue why. It's worth 2 marks that I really need. Thanks for your help inadvamced!!