As to this matter,we have no choice,apart 发布时间:2018-07-02 03:21 │ 来源:www.tikuol.com 题型:问答题 问题: As to this matter,we have no choice,apart from telling him the truth.
题型:问答题 如图所示,用一块金属板折成横截面为U形的金属槽放置在磁感应强度为B的匀强磁场中,并以速率v1向右匀速运动,从槽口右侧射入的带电微粒的速率是v2,如果微粒进入槽后恰能做匀速圆周运动,则微粒做匀速圆周运动的轨道半径r和周期T分别为[ ]A. B. C. D. 查看答案