单选题-单题 较易0.85 引用5 组卷315
如图甲是某种静电矿料分选器的原理示意图,带电矿粉经漏斗落入水平匀强电场后,分落在收集板中央的两侧.如图乙是喷涂原理示意图,静电喷涂利用了电荷之间的相互作用.下列表述正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/05548eff-9fbe-4023-a9ff-1f08c503b94f.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/4f06b048-ecf4-46a7-ac83-a542d33f1c5d.png?resizew=299)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/05548eff-9fbe-4023-a9ff-1f08c503b94f.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/4f06b048-ecf4-46a7-ac83-a542d33f1c5d.png?resizew=299)
A.图甲中,对矿粉分离的过程,带正电的矿粉落在右侧,静电力对矿粉做正功 |
B.图甲中,对矿粉分离的过程,带正电的矿粉落在左侧,静电力对矿粉做负功 |
C.图乙中,涂料微粒一定带负电,喷嘴与工件之间的电场为非匀强电场 |
D.图乙中,涂料微粒一定带正电,喷嘴与工件之间的电场为匀强电场 |
22-23高二上·陕西咸阳·阶段练习
类题推荐
图5是某种静电矿料分选器的原理示意图,带电矿粉经漏斗落入水平匀强电场后,分落在收集板中央的两侧,对矿粉分离的过程,下列表述正确的有
![](https://img.xkw.com/dksih/QBM/2012/6/15/1575266876653568/1575266901483520/STEM/fbb3cde8-d57d-467e-adad-952bae4f151a.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/2012/6/15/1575266876653568/1575266901483520/STEM/fbb3cde8-d57d-467e-adad-952bae4f151a.png?resizew=134)
A.带正电的矿粉落在右侧 |
B.电场力对矿粉做正功 |
C.带负电的矿粉电势能变大 |
D.带正电的矿粉电势能变小 |
如图,是某种静电矿料分选器的原理示意图,带电矿粉经漏斗落入水平匀强电场后,分落在收集板中央的两侧。对矿粉分离的过程,下列表述正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858929868587008/2859137062739968/STEM/8780dfb7-e127-4166-894c-377332a689b0.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858929868587008/2859137062739968/STEM/8780dfb7-e127-4166-894c-377332a689b0.png?resizew=133)
A.带正电的矿粉落在右侧 |
B.带正电的矿粉电势能变大 |
C.电场力对带负电的矿粉做正功 |
D.矿粉运动轨迹与带电量无关 |
如图是某种静电矿料分选器原理图,带正、负电矿粉经漏斗落入水平匀强电场后,分落在收集板中央的两侧,下列关于带负电矿粉分离的过程表述正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/3/3/2928264313307136/2928414746099712/STEM/c6d28992-26b2-48dc-bf20-1ebe05ec68eb.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/2022/3/3/2928264313307136/2928414746099712/STEM/c6d28992-26b2-48dc-bf20-1ebe05ec68eb.png?resizew=186)
A.落在左侧 | B.动能变小 | C.电势能变小 | D.电场力对矿粉做正功 |
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