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phanthiminh206
2 năm trước
Cho hai điện tích điểm q1 = 2 C và q2 = - 2 C đặt tại hai điểm A và B trong chân không , AB = 5 cm. Xác định véc tơ lực điện tổng hợp tác dụng lên điện tích qo = 5 C đặt tại điểm M sao cho: 1. MA = 3 cm , BM = 2 cm. (325N) 2.MA = 4 cm , BM = 9 cm. (45,14N) 3. MA = BM = 5 cm. (36N) 4. MA = 4 cm , BM = 3 cm. (115N) 5. MA = BM = 8 cm. (8,79N)
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