Two equal charges ‘q′ of opposite sign are separated by a small distance ‘d′. The electric intensity ‘E′ at a point on the straight line passing through the two charges at a very large distance ‘r′ from the midpoint of two charges is :
Two equal charges q of opposite sign are separated by a small distance '2l'. The electric potential at a point on the perpendicular bisector of the line joining the two charges at a distance r is :