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 /akl /eqfi3u7 circular orbit. ydg 3nigcmb;r/k5d.w1vq0r in a uniform magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic y .wb;135rng.c v i0ddgmkq/rfield. 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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