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]
97.28: An ion with charge q, mass p ;sk w xs l(q)ixdh+ 9z(g+7wgqc*av/ckl) +wm, and speed v enters a magneti)lhu frpb zlyfoqb7d5(.m,88*xxf x-7ygl+z c field B and is deflected into a path with a radius of curvature R. If a second ion has speed 2v, w* ,qyz8lyf7h) lxurdx85 fbx(zf 7gm.o p+ l-bhile m, q, and B are unchanged, what will be the radius of the second ion’s path?
A. is 4R
B. is 2R
C. is R
D. is R/2
E. is R/4
参考答案: B
本题详细解析:
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