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Physics, 19.08.2021 07:00 angelapegues20097

Giữa hai bản kim loại đặt song song nằm ngang tích điện trái dấu có U=1000 V, khoảng cách giữa hai bản là d= 1cm. Chính giữa hai bản có một giọt thủy ngân lơ lửng. Đột nhiên hiệu điện thế giảm xuống còn 995V. Tìm thời gian để giọt thủy ngân rơi xuống bản dưới? A. 0,67 s. B. 0,54 s. C. 0,45 s. D. 1,25 s.

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Giữa hai bản kim loại đặt song song nằm ngang tích điện trái dấu có U=1000 V, khoảng cách giữa hai b...
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