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(接10月刊)~①二、电、磁场环境中带电体的变轨通过设置有特殊关系的方波电场和方波磁场,能够实现带电体类抛体运动与圆周运动的不断转轨,以考查两类最典型的曲线运动的知识及空间关系的处理能力.例4如图1甲所示,在光滑绝缘的水平桌面上建立一xOy坐标系,平面处在周期性变化的电场和磁场中,电场和磁场的变化规律如图1乙所示(规定沿+y方向为
(Continued from October issue) ~ ① Second, the orbit change in the electric and magnetic field environment By setting a special relationship between the square wave electric field and the square wave magnetic field, can achieve charged body type of movement and circular movement of the continuous transition to test Two typical types of curvilinear motion knowledge and the ability to handle spatial relationships Example 4 As shown in Figure 1, an xOy coordinate system is established on a smooth, insulated, horizontal table with periodically varying electric and magnetic fields, The electric field and magnetic field change rules are shown in Figure 1 B (provided + y direction