Romero Paul
10/05/2024 · Junior High School

2. Một electron chuyển động dọc theo đường sức của một điện trường đều. Cương độ điện trường \( \mathrm{E}=100 \) V/m. Vận tố ban đầu của electron bằng \( 300 \mathrm{~km} / \mathrm{s} \). Hỏi electron chuyê̂n động được quãng đường dài bao nhiêu thì dừng lại. Cho biết khối lượng electron \( m_{e}= \) \( 9,1 \cdot 10^{-31} \mathrm{~kg} \). A. \( 5,12 \mathrm{~mm} \) B. \( 10,24 \mathrm{~mm} \) C. \( 2,56 \mathrm{~mm} \) D. \( 8,5 \mathrm{~mm} \)

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Quãng đường electron chuyển động trước khi dừng lại là \( 2.56 \, \text{mm} \).

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