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2 năm trước
hai điện tích điểm q1 = 3uc và q2 = -2uc đặt tại A và B cách nhau một khoảng AB = 6cm a. tính lực tương tác giữa chúng ? b. tính cường độ điện trường tổng hợp tại điểm C nằm trên đường trung trực của AB cách AB một khoảng x= 4cm có độ lớn gần bằng ? c. tính cường độ điện trường tại C cách A 2cm và cách B 8cm?
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