Fields D.2 Electromagnetic Fields & Potential (id: 1724d7333)

本题目来源于试卷: Fields D.2 Electromagnetic Fields & Potential，类别为 IB物理学

[单选题]
Two parallel plates are separated by a d 3yzcmhhgzgik 9+71v b ;(q(coistance d and connected ( /s/l;hwii)zuh g/iwto a battery of potential difference V as shown in the diagram. A proton released from the positive plate gains a speed v when it w hu )ii/zs/;i(/lwgh reaches the opposite plate.
The separation of the plates is decreased to $\frac{d}{2}$​.
What would be the speed gained by an alpha particle released from the positive plate, when it reaches the opposite plate?

A. $\frac{v}{\sqrt{2}}$
B. $\frac{v}{2}$
C. $v$
D. $v\sqrt{2}$


参考答案:  A


本题详细解析:

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