首页/ 题库 / [单选题]如图所示,在MNQP中有一垂直纸面向里的的答案

如图所示,在MNQP中有一垂直纸面向里的匀强磁场。质量和电荷量大小都相等的带电粒子a、b、c以不同的速率从O点沿垂直于PQ的方向射入磁场,图中实线是它们的轨迹。已知O是PQ的中点,不计重力。下列说法正确的是:( )

单选题
2022-04-02 16:55
A、粒子a带负电,粒子b、c带正电;
B、射入磁场时粒子a的速率最小;
C、射入磁场时粒子b的动能最小;
D、粒子c在磁场中运动的时间最长。
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正确答案
D

试题解析

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