Question

The variation of electrostatic potential with radial distance r from the centre of a positively charged metallic thin shell of radius R is given by the graph

Answer 1

Ans:(3).

Explanation: charge inside the shell is zero.Electric field inside the shell also zero.

Electrostatic potential constant from centre to surface of shell.

V=KQ/R=Q/4π£°R (inside)

V=KQ/r=K/4π£°r (outside).