Q 12-02-019NEETJEE MainEAMCET 2008 (Engineering)Easy
Two charges $q$ and $-q$ are kept apart. Then at any point on the perpendicular bisector of the line joining the two charges
Answer: (B) the electric potential is zero
Concept. Points on the bisector are equidistant from both charges.
Step 1. Potential. $\dfrac{kq}{r} - \dfrac{kq}{r} = 0$.
Step 2. Field. Components along the axis add: $E \ne 0$.
Answer. The electric potential is zero (Option B).
Solution by Sreeraj P, M.Sc Physics