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Physics, 15.06.2021 08:30 breezyalanah
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 20cm x 40cm 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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