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Physics, 23.06.2021 06:20 lpssprinklezlps

Câu 1: Một mặt phẳng vô hạn tích điện đều, mật độ σ = 4.10-9 C/cm2 , đặt thẳng đứng trong
không khí. Một quả cầu nhỏ có khối lượng 8 g, mang điện tích q = 10-8 C treo gần vào mặt
phẳng, sao cho dây treo lúc đầu song song với mặt phẳng. Lấy g = 9,8m/s2
. Khi cân bằng,
dây treo quả cầu hợp với mặt phẳng 1 góc bằng bao nhiêu?

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Câu 1: Một mặt phẳng vô hạn tích điện đều, mật độ σ = 4.10-9 C/cm2 , đặt thẳng đứng trong
khô...
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