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]
03.34: A positively charged par8a wmh.f:3p-cg jt+ ge + /xlh j5j-2g1xzu 77gas pin5xh6jfsticle of mass M is at rest on a table. A non- zero electric field E is directed into the plane of the table. A non-zero magnetic field B is directed out of the plane of tha s1ihg+u5zg 7sp xjxnj 6x/2l-7jh5fe table. What is true about the magnitude of the electric force on the particle $F_E$ compared to the magneti force on the particle $F_B$?
A. $F_E$ >$F_B$
B. $F_E$ <$F_B$
C. $F_E$ =$F_B$
D. It cannot be determined without knowing the exact value of the charge of the particle
E. The relative sizes of the electric and magnetic fields are needed to answer this question
参考答案: A
本题详细解析:
暂无
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