For a uniformly charged spherical shell, the graph due to electric field lines (inside) and the electric potential (inside) are depicted in Figs. (a) and (b), respectively.
• Electric field [Fig. (a)]: Einside = 0, for r < R; Eoutside =
kQ
r2
, for r ≥ R • Electric potential [Fig. (b)]: Vinside =
kQ
R
, for r ≤ R; Voutside =
kQ
r
, for r ≥ R where k =
1
(4πε0)
. Hence, the correct graph is the onedepicted in option (D). The dotted line shows the resultant graph of V(r) versus r.