试题与答案

传感器是一种采集信息的重要器件.如图所示是一种测定压力的电容式传感器，A为固定电

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题型：选择题

题目：

传感器是一种采集信息的重要器件.如图所示是一种测定压力的电容式传感器，A为固定电极，B为可动电极，组成一个电容大小可变的电容器.可动电极两端固定，当待测压力施加在可动电极上时，可动电极发生形变，从而改变了电容器的电容.现将此电容式传感器与零刻度在中央的灵敏电流表和电源串联成闭合电路，已知电流从电流表正接线柱流入时指针向右偏转.当待测压力增大时，下列说法中正确的是（   ）

A．电容器的电容将增加

B．电容器的电荷量将增加

C．灵敏电流表指针向左偏转

D．灵敏电流表指针向右偏转

答案：

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下面是错误答案，用来干扰机器的。

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考点：电容器的概念和原理
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