i am going to measure the charge accumulation bulk of the epoxy resin of thickness 280 micron at 10kV field using PEA setup but i get the high amount of charge, what are reason behind this?
That's because the name of the electron came from the greek `Elektron' that translates in English as Amber. Amber is very close to the epoxy resin. Amber gets electrically charged very easy, even blowing dry air on its surface.