anhnguyenngocle anhnguyenngocle

14-08-2021
Physics

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cho hình vuông ABCD, tại A và C đặt các điện tích q1=q3=q. Hỏi phải đặt ở B một điện tích bằng bao nhiêu để cường độ điện trường bằng 0

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wmobacher wmobacher

14-08-2021

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