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例1如图1,一带负电荷的油滴在匀强电场中运动,其轨迹在竖直面(纸面)内,且相对于过轨迹最低点P的竖直线对称(忽略空气阻力)。由此可知()。A.Q点的电势比P点高B.油滴在Q点的动能比它在P点的大C.油滴在Q点的电势能比它在P点的大D.油滴在Q点的加速度大小比它在P点的小
Example 1 As shown in Figure 1, a negatively charged oil droplet moves in a uniform electric field whose trajectory is in the vertical plane (paper plane) and is symmetrical with respect to the vertical line passing the lowest point P of the trajectory (ignoring the air resistance). This shows (). The potential of the AQ point is higher than the point P B. The kinetic energy of the oil drop at point Q is greater than it is at point C. The potential of the oil drop at point Q is greater than its potential at point D. D. The acceleration of the oil drop at point Q The size is smaller than it is at P