11.如图所示半径为r的圆形区域内有垂直于纸面�里的匀强磁场磁感应强度大小为b.若在圆心处静止的原子核中释放一个质量为m电量为q的粒子 Template




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tomski11.如图所示半径为r的圆形区域内有垂直于纸面�里的匀强磁场磁感应强度大小为b.若在圆心处静止的原子核中释放一个质量为m电量为q的粒子 coloring