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带电粒子在复合场中的运动问题,是高考物理的必考题型,也是高中物理知识的重难点。所谓复合场就是指电场、磁场、重力场并存的场,常见的复合场问题可归为以下几类问题。一、带电粒子在复合场中做直线运动1.带电粒子在复合场中做匀速直线运动粒子所受合外力为零时,所处状态一定为静止或匀速直线运动。第一种类型:粒子运动方向与磁场平行时,电场力与重力平衡,做匀速直线运动。第二种类型:粒子运动方向与磁场垂直时,洛伦兹力、电场力与重力平衡,做匀速直线运动。正确画出受力分析图是解题的关键。
The movement of charged particles in the composite field is a necessary test type for college entrance examination physics and a heavy difficulty in high school physics knowledge. The so-called composite field refers to the field of electric field, magnetic field, gravity field coexistence, common complex field problems can be grouped into the following types of problems. First, the charged particles do linear motion in the composite field 1. Charged particles in the composite field to do uniform linear motion particles subjected to zero external force, where the state must be stationary or uniform linear motion. The first type: particle movement direction and the magnetic field parallel, the electric field force and gravity balance, do uniform linear motion. The second type: particle movement direction perpendicular to the magnetic field, Lorentz force, electric field force and gravity balance, do uniform linear motion. Proper drawing stress analysis diagram is the key to solving problems.