The electric field E due to a point charge at any point near it is defined as
` " " E= underset( q_0to 0) lim (F)/(q_0) `
Draw the electric field lines of a point charge Q when (i) ` Q gt 0, and (ii) Q lt 0.`

Explanation

In the definition of electric field E we take test charge `q_0` as small as possible so that presence of test charge does not affect the electric field at all. That.s why we consider ` undersetto (qto 0) lim `
Electric field lines of a point charge (i) ` Q gt 0, and (ii) Q lt 0 ` have been plotted in respectively.