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]
02.15: A positively charged pa lyx2q deolbxv*/*o gd 9 k5+;jrticle m - d1jov .dv 6 zc.vv+uxqid2p1oves to the right. It enters a region of space in which there is an electric field directed up the plane of the paper (see figure). In which direction does a magnetic field have to point in this region so that the particle maintains 6.ojc21vdi1d v zd vq ux.+vp- a constant velocity?
A. Into the plane of the page
B. Out of the plane of the page
C. To the right
D. To the left
E. Up the plane of the page
参考答案: B
本题详细解析:
暂无
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