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hoang212121
2 năm trước
hai điện tích điểm q1=5.10^-5 c và q2 = 6.10^-5 c đặt tại 2 điểm a,b cách nhau 10cm trong chân không . xác định lực điện tổng hợp tác dụng lên điện tích q3 = -5.10^-5 c trong trường hợp q3 nằm tại điểm c là trung điểm của ab
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