Draw a plot showing the variation of (i) electric field E, and (ii) electric potential V with distance 'r' due to a point charge Q.

Explanation

(i) Electric field E at a point situated at a distance r from a given point charge Q is given as :
`E = 1/(4pi epsi_0). Q/r^2`
(ii) The electric potential at a point varies as
`V = 1/(4pi epsi_0) . Q/r`
As a result, the graphical variation of E as well as V with r is as being shown in Fig.