Static electricity(静电学) The property of electric charge: 1.There are two kinds of electric charge,positive charge and negative charge. 2.Like charges repel.And unlike charge attract. 3.Free charge is quantified in positive or negative integral multiples of e. e=1.602*10-19CStatic electricity(静电学） The property of electric charge: 1. There are two kinds of electric charge, positive charge and negative charge. 2. Like charges repel. And unlike charge attract. 3. Free charge is quantified in positive or negative integral multiples of e. e=1.602*10-19 C