If a charged body experiences a force of repulsion of magnitude $F$ from a charge of $q_0$, the electric field $E$ of the charged body at a point lying not in between the $2$ charges but on the same line joining two charges, is :

Two equal charges $‘q’$ of opposite sign are separated by a small distance $‘2a’$. The electric intensity $‘E’$ at a point on the perpendicular bisector of the line joining the two charges at a very large distance $‘r’$ from the line is :