如图所示,带箭头的直线是某一电场中的一条电场线,在这条线上有
、
两点,用
、
表示
、
两处的场强,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a52e114f-5070-4b09-a412-767b7643921f.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d901f94e6a8805b640c335de4df7f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ef693b37366dac658541ed2e56b29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a52e114f-5070-4b09-a412-767b7643921f.png?resizew=167)
A.正试探电荷只受电场力作用下一定沿![]() ![]() |
B.因为![]() ![]() ![]() |
C.电场线从![]() ![]() ![]() |
D.电场线从![]() ![]() ![]() ![]() |
更新时间:2022-11-25 14:27:49
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【推荐1】如图所示的电场中,从P点沿着电场线,电场强度逐渐增大的是( )
![](https://img.xkw.com/dksih/QBM/2016/11/28/1575962607280128/1575962608107520/STEM/c7e90c6f-380c-4038-a3a7-e3f67be4d851.png?resizew=512)
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A.A | B.B | C.C | D.D |
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【推荐2】某根电场线方向如图。则图中A、B位置的场强EA、EB之间的大小关系为( )
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A.EA>EB | B.EA<EB | C.EA=EB | D.不能确定 |
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【推荐1】如图所示,a、b、c 是同一条电场线上的三个点,其电场强度大小分别为 Ea、Eb、Ec, 电势分别为a、b、c。则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/13961d37-fefe-4398-b272-dbd111d67444.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/13961d37-fefe-4398-b272-dbd111d67444.png?resizew=139)
A.Ea<Eb<Ec | B.Ea=Eb=Ec | C.a>b>c | D.a=b=c |
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【推荐2】一负电荷在电场中仅受电场力作用,从A点运动到B点,速度随时间变化的图象如图所示,
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c106e540-1252-488a-8bda-2b31183f04a8.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26be9869a8ac77744a0d09f5da3e64cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93148e947d585e4ade3ba422d075c451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c106e540-1252-488a-8bda-2b31183f04a8.png?resizew=160)
A.A处的场强一定小于B处的场强 |
B.A处的电势一定低于B处的电势 |
C.电荷在A处的电势能一定小于在B处的电势能 |
D.从A到B的过程中,电场力对该电荷做正功 |
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