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怎样理解电量几乎不变而电压变大──一道高考选择题解答释疑广东湛江一中申探禄１９９６年高考物理试卷第６题：如图所示的实验装置中，平行板电容器的极板Ａ与一灵敏的静电计相接，极板Ｂ接地．若极板Ｂ稍向上移动一点，由观察到的静电计指针变化作出平行板电容器电容变...
How to understand that the power is almost constant and the voltage becomes larger - a college entrance examination multiple-choice questions to answer questions Guangdong Zhanjiang one Shenshenlu 1996 college entrance examination physics paper Question 6: In the experimental device shown in the figure, the plates of parallel plate capacitors A Connected to a sensitive electrometer, plate B grounded. If the plate B moves slightly upwards, the capacitance of the parallel plate capacitor changes due to the observed change of the electrometer pointer.