本题目来源于试卷: Fields D.2 Electromagnetic Fields & Potential，类别为 IB物理学
[单选题]
An electron is released from the nege0h+9hdw+ +j39rm r4a (i mhlcjjr -roati3a vn3i7ok1 jkve plate of two oppositely charged parallel plates placed a fixed distance apart. The potential differv3kkn a1 io37jence between the two plates is V, and the electron reaches the positive plate with a speed v.
What would be the final speed of the electron if the distance between the plates remained the same, but the potential difference between them were doubled?
A. v$\sqrt{2}$
B. 2v
C. $\frac{v}{2}$
D. $v$
参考答案: A
本题详细解析:
| 
