• 2022-06-16
    两个同心均匀带电球面,半径分别为Ra和Rb(RaA: (Qa+Qb)/(4*πε0r^2)
    B: (Qa-Qb)/(4*πε0r^2)
    C: 1/(4*πε0)×(Qa/r^2+Qb/Rb^2)
    D: Qa/(4*πε0r^2)