The two point charges q1 = +12µC and q2 = -16µC are separated by a distance of 0.20 m.
(i) On the line joining them, find out all points where the electric field is zero.
(ii) On the line joining them, find out all points where the electric potential is zero.
(iii) Outside of the line joining them, are there any points where the electric potential is zero? What regarding the electric field?