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A选项若Q不变,由C=
![](https://img.yulucn.com/upload/3/77/37776e2707e84200d3ee6b88d8fa9e5c_thumb.jpg)
知U变小,C变大,可知h变大,A错.B选项若Q不变,由C=
![](https://img.yulucn.com/upload/3/77/37776e2707e84200d3ee6b88d8fa9e5c_thumb.jpg)
知U变大,C变小,可知θ变大,B对.C中若U不变,电流流向负极表示正在放电,Q减小,可知C减小,x变大,C错.D中若U不变,电流流向正极表示在充电,Q增加,可知C增大,d减小,F增大,D对.
思路分析:由C=
![](https://img.yulucn.com/upload/3/77/37776e2707e84200d3ee6b88d8fa9e5c_thumb.jpg)
知U变小,C变大,可知h变大, 若Q不变,由C=
![](https://img.yulucn.com/upload/3/77/37776e2707e84200d3ee6b88d8fa9e5c_thumb.jpg)
知U变大,C变小,可知θ变大,若U不变,电流流向负极表示正在放电,Q减小,可知C减小,x变大,D中若U不变,电流流向正极表示在充电,Q增加,可知C增大,d减小,F增大,
试题点评:本题考查了非半导体材料做成的传感器的工作原理
1年前
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