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问题.如图1(甲)所示,在空间存在一个变化的电场和一个变化的磁场,电场的方向水平向右(图中由B到C),场强大小随时间变化如图(乙)所示;磁感应强度方向垂直于纸面,大小随时间变化如图(丙)所示,从t=1s开始,在A点每隔2s有一个同种的离子沿AB方向(垂直于BC)的初速度v0射出,恰好能击中C点,若AB=BC=L,且粒子在AC间的运动时间小于1s,求:图像中E和B的比
As shown in Figure 1 (a), there is a changing electric field and a changing magnetic field in space, the direction of the electric field is horizontal to the right (B to C in the figure) ; Magnetic induction direction perpendicular to the paper, the size changes with time as shown in Figure (C), starting from t = 1s, at point A every 2s have a same kind of ions in the AB direction (perpendicular to the BC) Initial velocity v0 shot, just hit the C point, if AB = BC = L, and particles in the AC between the movement time is less than 1s, seeking: E and B image ratio