如图所示，虚线表示某电场的等势面，一带电粒子仅在电场力作用下由A运动到B的径迹如图中实线所示．粒子在A点的加速度为aA、电势能为EPA；在B点的加速度为aB、电势能为EPB．则下列结论正确的是

题干

如图所示，虚线表示某电场的等势面，一带电粒子仅在电场力作用下由A运动到B的径迹如图中实线所示．粒子在A点的加速度为a_A、电势能为E_PA；在B点的加速度为a_B、电势能为E_PB．则下列结论正确的是（）

A：粒子带正电，a_A＞a_B，E_PA＞E_PB

B：粒子带负电，a_A＞a_B，E_PA＞E_PB

C：粒子带正电，a_A＜a_B，E_PA＜E_PB

D：粒子带负电，a_A＜a_B，E_PA＜E_PB

上一题下一题 0.0难度选择题更新时间:2019-11-01 12:09:42

D

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Visit to Mauritius(毛里求斯)
Country	Mauritius is an island country with ⑴ around it.
Sports	Beach volleyball, fishing and swimming
The most beautiful moment	When you enjoy the beautiful ⑵ and clear seas, you may think you are in the heaven.
Language	⑶

⑴____ A. sea. B. mountain C. river

⑵____ A. sunshine B. sunrises C. sunsets

⑶____ A. English, French and German

B. English, Chinese and Japanese

C. English, French and Japanese