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1题目2013年江苏省高考物理试题第15题.在科学研究中,可以通过施加适当的电场和磁场来实现对带电粒子运动的控制.如图1所示的xOy平面处于匀强电场和匀强磁场中,电场强度E和磁感应强度B随时间t做周期性变化的图像如图2所示.x轴正方向为E的正方向,垂直纸面向里为B的正方向.在坐标原点O有一粒子P,其质量和电荷量分别为m和+q,不计重力.在t=τ/2时刻释
1 topic 2013 Jiangsu province college entrance examination physics test question 15. In scientific research, can be achieved by applying the appropriate electric and magnetic field to control the movement of charged particles shown in Figure 1 xOy plane in uniform electric field and uniform Magnetic field, the electric field strength E and magnetic induction intensity B with time t to do cyclical changes in the image shown in Figure 2. Positive x-axis direction is the positive direction of E, perpendicular to the paper in the positive direction of B. There is a Particle P, its mass and charge are m and + q, respectively, regardless of gravity. At t = τ / 2 time release