如图5所示，实线是电场中一簇方向未知的电场线，虚线是一个带正电粒子从a点运动到b点的轨迹，若带电粒子只受电场力作用，粒子从a点运动到b点的过程中_刷题宝

题干

如图5所示，实线是电场中一簇方向未知的电场线，虚线是一个带正电粒子从a点运动到b点的轨迹，若带电粒子只受电场力作用，粒子从a点运动到b点的过程中

A：运动的加速度逐渐增大

B：运动的速度逐渐减小

C：粒子的电势能逐渐减小

D：a点的电势比b点的电势高

上一题下一题 0.0难度选择题更新时间:2017-02-19 02:42:44

答案(点此获取答案解析）

B

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