PhysicsMedium46×since 2002Q6991A thin spherical conducting shell of radius RRR has a charge q.q.q. Another charge QQQ is placed at the center of the shell. The electrostatic potential at a point PPP a distance R2{R \over 2}2R from the center of the shell isA2Q4πε0R{{2Q} \over {4\pi {\varepsilon _0}R}}4πε0R2QB2Q4πε0R−2q4πε0R{{2Q} \over {4\pi {\varepsilon _0}R}} - {{2q} \over {4\pi {\varepsilon _0}R}}4πε0R2Q−4πε0R2qC2Q4πε0R+q4πε0R{{2Q} \over {4\pi {\varepsilon _0}R}} + {q \over {4\pi {\varepsilon _0}R}}4πε0R2Q+4πε0RqD(q+Q)24πε0R{{\left( {q + Q} \right)2} \over {4\pi {\varepsilon _0}R}}4πε0R(q+Q)2Check answerSkip