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Physics, 14.06.2021 16:40 22emilyl530

Đặt lần lượt các điện tích q1 = 1nC ; q2 = -1nC ; q3 =1nC ; q4 = 1nC vào các đỉnh A, B, C, D của hình chữ nhật, kích thước 20 cm 40 cm trong không khí. Tính điện thế tại O là giao điểm của hai đường chéo hình chữ nhật, chọn gốc điện thế tại vô cùng

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Đặt lần lượt các điện tích q1 = 1nC ; q2 = -1nC ; q3 =1nC ; q4 = 1nC vào các đỉnh A, B, C, D của hìn...
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