Charging by friction Table 8.1 The Electrostatic Series Cat's fur Low affinity Acetate for electrons Glass Wool Lead Silk Wax Ebonite Copper Rubber A plastic comb that has been charged by Amber running it through your hair attracts neutral objects such as bits of paper or, Sulphur High affinity as seen here,drops of water. Gold for electrons顿牟掇芥 ,磁石 引针 Charging by friction