本题目来源于试卷: Motion of charged particle and Velocity selector and Mass spectrometer，类别为 美国物理杯赛(Physics Bowl)
[单选题]
16.44: A proton moves in a circular qia c1ta6g7b 8orbit in a uniform magnetic c;a-xyxa/xf. field B. A helium nucleus moves in a circular orbit in the same magfx- xaac.x;/ ynetic field. If each particle experiences the same magnitude magnetic force during its motion, what is the ratio of the speed of the helium to the speed of the proton?
A. 4:1
B. 1:4
C. 1:1
D. 2:1
E. 1:2
参考答案: E
本题详细解析:
暂无
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