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 orbit in jne) bea;j v*v5d3p )ta uniform magnetic field B. A heliu; t n)d*)3bpaeev5vjj 6kwqrrc(7x1 afhar 3(m nucleus moves in a circular orbit in the same magnetic field. If each particle experiences the same magnitude magnetic force during its motion, what is the ratio of the speed of the helium to t 7a (h 1wrrxqk(acf63rhe 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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