• 2022-05-29
    有均匀带电的球体,半径为[img=14x19]1802f279d78af6d.png[/img],电量为[img=29x23]1802f279e11c690.png[/img],求球内外场强( )
    A: 球内是0,球外是[img=50x47]1802f279e9b8453.png[/img]
    B: 球内球外都是[img=50x47]1802f279e9b8453.png[/img]
    C: 球内[img=59x44]1802f279fb340ef.png[/img],球外[img=50x47]1802f279e9b8453.png[/img]
    D: 球内[img=49x44]1802f27a0d1add0.png[/img],球外[img=50x47]1802f279e9b8453.png[/img]
  • 举一反三