带电粒子在匀强电场中的运动问题,是近几年来高考的B级要求。即要理解所列知识的确切含义及与其它知识的联系,能够进行叙述和解释,并能在实际问题的分析、综合、推理和判断等过程中运用。 带电粒子在匀强电场中的偏转问题,我们往往是把它分解为两个分运动来计算。即平行于场强方向的变速直线运动与垂直于场强方向的匀速直线运动,这两个分运动的合成即为所求。当场强恒定不变时,计算 The movement of charged particles in a uniform electric field is a Class B requirement for the college entrance examination in recent years. That is to understand the exact meaning of the listed knowledge and the connection with other knowledge, to be able to describe and explain, and can be applied in the process of analysis, synthesis, reasoning and judgment of practical problems. The problem of deflection of charged particles in a homogeneous electric field is often calculated by dividing it into two partial motions. That is to say, the combination of the shift linear motion parallel to the direction of the field strength and the uniform linear motion perpendicular to the direction of the field strength is the synthesis of the two partial motions. When the field strength is constant, the calculation