Đặt điện tích Q = 2.10-5C tại gốc tọa độ O của hệ trục Oxy. Xét hai điểm A(6;0) và B(3;4) trên hệ trục có đơn vị đo là cm. Chọn gốc điện thế ở vô cùng. Tính công của lực điện trường khi dịch chuyển điện tích q = -1μC từ A đến B.. giúp mình vs ạ

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