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Physics, 30.07.2021 16:50 janetexcoelho

Cho hai mặt cầu đồng tâm O tích điện đều. Bán kính của hai mặt cầu lần lượt là R1 và R2 (R2>R1). Điện tích mặt trong là q và mặt ngoài là Q a. Tính cường độ điện trường tại một điểm cách tâm O một đoạn r (biết R1 < r < R2)
b. Tính hiệu điện thế giữa hai mặt cầu

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Cho hai mặt cầu đồng tâm O tích điện đều. Bán kính của hai mặt cầu lần lượt là R1 và R2 (R2>R1)....
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