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课题:带电粒子在周期性变化的电场中的直线运动。 1 设计思想 关于带电粒子在电场中的运动,新教材选修本第201页这样写道:“带电粒子在电场中要受到电场力的作用,因此要产生加速度,速度的大小和方向都可以发生变化”。此处,教材意指带电粒子在电场中的直线运动隶属力学模型类,运动状态的变化受电场力和运动的起始条件约束。
Topic: Linear motion of charged particles in a periodically changing electric field. 1 Design Ideas Regarding the movement of charged particles in an electric field, the new textbook, edited on page 201, states: “The charged particles are subjected to the electric force in the electric field. Therefore, to generate acceleration, the magnitude and direction of the velocity can change. ". Here, the teaching materials mean that the linear motion of charged particles in the electric field belongs to the mechanical model class, and the change of the motion state is constrained by the starting conditions of the electric field force and the motion.