1问题的提出有这样一道考查带电粒子在匀强电场中运动的选择题,题目具体如下.原题.如图1所示,AB是圆O的一条直径,OC为圆的半径,∠AOC=90°,圆O所在空间有一匀强电场.相同的带正电的粒子,以相同的初动能E k0沿不同方向从A点出发,能够经过圆周上其他一些点,其中经过B点的粒子的动能为1.5E k0,经过C点的粒子的动能为2E k0.不计粒子所受重力及粒子间相互作用的影响.下列说法中正确的是 The problem is presented as follows: (1) As shown in Figure 1, AB is the diameter of a circle O, OC is the radius of the circle, ∠ AOC = 90 °, there is a uniform strong electric field in the space where the circle O. The same positively charged particles, with the same initial kinetic energy E k0, proceed from point A in different directions and pass through other points on the circumference, wherein particles passing through point B The kinetic energy is 1.5E k0, and the kinetic energy of particles passing through point C is 2E k0. Excluding the gravitational force of particles and the interaction between particles, the following is correct