2.14 Two tiny spheres carrying charges and are located 30 cm apart. Find the potential and electric field:
(a) at the mid-point of the line joining the two charges
As we know
Outside the sphere, we can assume it like a point charge. so,
the electric potential at midpoint of the two-sphere
where q1 and q2 are charges and d is the distance between them
SO,
The electric field