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]
96.40: A proton of m;xb nnwl6r07egaf6 :uass M and kinpux hf.t ip470etic energy $E_k$ passes undeflected through a region with electric
and magnetic fields perpendicular to each other. The electric field has magnitude E. The magnitude
of the magnetic field B is:
A. $\sqrt{\frac{ME^2}{E_K}}$
B. $\sqrt{\frac{ME}{2E_K}}$
C. $\sqrt{\frac{2ME^2}{E_K}}$
D. $\sqrt{\frac{ME^2}{2E_K}}$
E. $\sqrt{\frac{ME^2}{E_K^2}}$
参考答案: D
本题详细解析:
暂无
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