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Physics, 16.12.2021 06:40 maddymaddy
Một vòng dây tròn, bán kính 20 cm, tích điện đều. Cường độ điện trường tại điểm M trên trục của vòng dây có giá trị lớn nhất khi M cách tâm O của vòng dây một khoảng bao nhiêu?
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Một vòng dây tròn, bán kính 20 cm, tích điện đều. Cường độ điện trường tại điểm M trên trục của vòng...
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