Give characteristics of electric field lines.

(N/A) $(i)$ $A$ tangent at any point on an electric field line gives the direction of the electric field at that point.
$(ii)$ Two electric field lines never intersect each other. If they were to intersect,there would be two tangents at the point of intersection,implying two directions of the electric field at the same point,which is physically impossible. Hence,two field lines can never cross each other.
$(iii)$ The density of electric field lines in any region of space indicates the intensity of the electric field in that region.
$(iv)$ Field lines of a uniform electric field are equidistant and parallel to each other.
$(v)$ Field lines originating from stationary electric charges do not form closed loops.
$(vi)$ The number of field lines passing through a unit area held normal to the field lines at any point is proportional to the magnitude of the electric field intensity at that point.