“加零法”巧妙地加一对等大反向的速度,使一个洛仑力与重力、电场力等恒力平衡,利用运动的合成和分解的思想,把复合场中带电粒子的运动问题简化为匀速度圆周运动和匀速直线运动,大大降低了解题的难度,并突出了物理的思想方法,“加零法”不失为一种巧妙的解题方法。 “Plus zero method ” cleverly plus a pair of opposite reverse speed, so that a Lorentz force and gravity, electric force and other constant force balance, the use of motion synthesis and decomposition of ideas, the composite field of charged particles The motion problem is simplified to a uniform circular motion and a uniform linear motion, which greatly reduces the difficulty of solving the problem and highlights the physical method of thinking. However, it is an ingenious method to solve the problem.