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【例题精讲】例1如图3-20甲所示,两块平行金属板MN、PQ水平放置,两板间距为d、板长为L,在紧靠平行板右侧的等边三角形区域内存在着匀强磁场,磁场方向垂直纸面向里,三角形底边BC与PQ在同一水平线上,顶点A与MN在同一水平线上.一个质量为m、电量为+q的粒子沿两板中心线以初速度v_0水平射入,若在两金属板间加某一恒定电压,粒子离开电场后垂直
Example Exquisite Example 1 As shown in Figure 3-20 A, two parallel metal plates MN and PQ are placed horizontally with the distance d between the two plates and the plate length L, in the area of the equilateral triangle close to the right side of the parallel plate The memory has a uniform magnetic field, the magnetic field perpendicular to the paper face inward, the triangle bottom BC and PQ in the same horizontal line, the vertex A and MN in the same horizontal line. A mass m, power + q particles along the two plate centerline The initial velocity of v_0 level injection, if the two plates plus a constant voltage between the particles leave the electric field vertical