UNIVERSITY PHYSICS II CHAPTER 16 Forces and lectric Fields 8 16.1 Coulomb's force law for pointlike charges 1. The discovery of electrification OThe phenomenon of electrification Glass rod is rubbed with silk--positive Amber rod is rubbed with fur --negative ② electric charge is an intrinsic characteristic of the fundamental particles making up Neutral copper matters Charged plastic1 1. The discovery of electrification 2electric charge is an intrinsic characteristic of the fundamental particles making up matters. 1The phenomenon of electrification Glass rod is rubbed with silk—positive Amber rod is rubbed with fur--negative §16.1 Coulomb’s force law for pointlike charges