第七章 静电场 本章综合能力提升练
本章综合能力提升练一、单项选择题1.“探究影响平行板电容器电容大小因素”的实验装置如图1所示,忽略漏电产生的影响,下列判断正确的是( )图1A.平行板正对面积减小时,静电计指针张角减小B.静电计可以用电压表替代C.静电计所带电荷量与平行板电容器电荷量不相等D.静电计测量的是平行板电容器所带电荷量答案 C解析 电容器带电荷量一定,平行板正对面积减小时,电容器的电容减小,根据Q=CU可知,两板间电势差变大,则静电计指针张角变大,选项A错误;静电计与电压表、电流表的原理不同,不能替代,电流表、电压表线圈中必须有电流通过时,指针才偏转,故不能用电压表代替静电计,选项B错误;静电计所带电荷量只是很小的...
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