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)j(vda:l l )b8pms7lz i;6miukei 9gio(o,lg9 )y8w lt n a circular orbit in a uniform magnetic field B. A helium nucleus moves in a circular orbit in the same magnetic field. If each particle exper;giygl9k(w9)86eim tou oi ,liences 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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