Deduce the following : Electric field intensity `overset (rarr)E` at a point.

Which is the unit of electric field intensity ?

What is the unit of electric field intensity ?

For an isolated point charge both the electric field-intensity, overset (rarr) (E) and potential (V) are zero only at….. .

How the electric field intesity overset (rarr)(E) and the potential gradient (frac (dV)(dx) ) related to each other.