- ThetwomethodsthatmakethecorrectPORtimesequenceDesignthePORforrelatedmaterialsandkeepincontactwiththesupplier....
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- 问题详情:如图所示,半径为R的圆环均匀带电,电荷线密度为λ,圆心在O点,过圆心与环面垂直的轴线上有P点,PO=r。以无穷远处为电势零点,则P点的电势φ为(点电荷电场中各点的电势,Q为点电荷电量,r为各点到点电荷的距离)( )A. B. C. D.【回答】B知识点:电势能和电势题型:...
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