本题目来源于试卷: Fields D.2 Electromagnetic Fields & Potential，类别为 IB物理学
[单选题]
Estimate the speed of an alpha particle that has accelerated from rest ifuj9elkx.k- mf8z+62 pq ;fr l9uvl3sn a unifuuz99fkfjl; pql+ e632mf 8k sr. xvl-47xn ;i ks:ihf ft20qcorm electric field E7nfs kft4iq cx 20i:;h=50 $^{−1}$ over a distance of 2.0m.
A. $0.5\times10^4\,ms^{−1}$
B. $5.0\times10^4\,ms^{−1}$
C. $0.5\times10^5\,ms^{−1}$
D. $0.5\times10^9\,ms^{−1}$
参考答案: B
本题详细解析:
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