• 2021-04-14
    ZHDY5-4*如图所示,AB=2l,OCD是以B为中心、l为半径的圆,点A处有正点荷+q,点B处有负点电荷-q,将电量为q/100的正点电荷从O点沿OCD移到D点,电场力对它作功()。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/6c73ec8124c8480a8ce4fafdca9f282c.png