如图所示,长为L、倾角为θ的光滑绝缘斜面处于电场中,一带电量为

如图所示,长为L、倾角为θ的光滑绝缘斜面处于电场中,一带电量为+q质量为m的小球,以初速度v0从斜面底端A点开始沿斜面上滑,当达到斜面顶端B点时,速度仍为vo,则下列说法正确的是

A、A、B两点间的电势差一定等于mgLsinθ/q

B、小球在B点的电势能一定大于在A点的电势能

C、若该电场是匀强电场,则其电场强度的最大值一定为mgq

D、若该电场是由斜面上方某位置的点电荷产生的,则该点电荷一定为负点电荷,且处于斜面中点的正上方。

答案

A

相关题目

How about ________a drink? A. have   B. to have    C. had   D. having
How about ________a drink? A. have   B. to have    C. had   D. having
16.在下面一段文字横线处补写恰当的语句,使整段文字语意
16.在下面一段文字横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密,每处不超过18个字。 互联网是一把双刃剑,用得好,它是
一定能在下列溶液中大量共存的离子组是( ) A.含有大量Al3
一定能在下列溶液中大量共存的离子组是( ) A.含有大量Al3+的溶液:Na+、NH、SO、Cl- B.c(H+)=1×10-13 mol/L的溶液:Na+、Ca2+、SO、CO C.含有大量
 It is the teacher _____taught me when I was a child _____ I’m going to visi
 It is the teacher _____taught me when I was a child _____ I’m going to visit. A. that, which     B. who, that       C. who, which         D. whom, that
Are some people born clever and others born stupid? Or is intelligence developed
Are some people born clever and others born stupid? Or is intelligence developed by our environment and our experiences? Strangely enough, the answer to both these questions is yes.To some extent ou
等差数列{an}的前n项和Sn=2n2+n,那么它的通项公式是A.an=2n-1 
等差数列{an}的前n项和Sn=2n2+n,那么它的通项公式是A.an=2n-1                  B.an=2n+1                    C.an=4n-1              
He was very busy yesterday; otherwise, he _____ to the meeting. A. would come
He was very busy yesterday; otherwise, he _____ to the meeting. A. would come             B. came C. would have come              D. will come
 “不要问我从哪里来,我的故乡已被拆”,这是流行的老百
 “不要问我从哪里来,我的故乡已被拆”,这是流行的老百姓对盲目进行旧城改造而拆除传统特色建筑行为的感慨。时下,许多富有特色的传统村落不

最新题目