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mymanh2006
2 năm trước
cho 2 đtđ, q1=10^-6C và q2= -4.10^-6C đặt tại 2 điểm A, B cách nhau 6cm trong K^2. a) Tính lực tương tác giữa chúng b) xác định cường độ điện tích tại M là trung điểm AB c) Xác định vị trí N mà tại đó vecto E N= vecto
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