• 2022-07-27
    如图所示为一空腔球形导体(不带电),现将一个带正电荷的小金属球A放入空腔中,当静电平衡时,图中a、b、c三点的场强E和电势U的关系是[img=517x411]1802ff3a92ebe2f.jpg[/img]
    A: Ea>Eb>Ec,Ua>Ub>Uc
    B: Ea = Eb>Ec,Ua = Ub>Uc
    C: Ea = Eb = Ec,Ua = Ub = Uc
    D: Ea>Ec>Eb,Ua>Ub>Uc