• 2022-06-05
    一空气平行板电容器,极板面积为S,两极板相距为d,电容器两端电压为U,若将厚度为d/2的金属板平行插入电容器内,保持电压U不变,则极板上电量增加Δq为 [img=300x132]180391019b9c79c.jpg[/img]
    A: [img=53x50]18039101a924826.jpg[/img]
    B: [img=74x52]18039101b74e49d.jpg[/img]
    C: [img=62x52]18039101c520cbe.jpg[/img]
    D: 0
  • 举一反三