· Có hai loại điện tích là : điện tích dương và điện tích âm. Các vật nhiễm điện cùng loại thì đẩy nhau, khác loại thì hút nhau.
· Nguyên tử gồm hạt nhân mang điện tích dương và các êlectrôn mang điện âm chuyển động quanh hạt nhân.
· Một vật sẽ nhiễm điện âm nếu nhận thêm êlectrôn, nhiễm điện dương nếu vật mất bớt êlectrôn.
Biên soạn: Thầy Võ Quốc Duy.
Email: quocduy240@mrstienclass.com
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