List of top Physics Questions on Electric Charge asked in Haryana PMT

Two point charges $-q$ and $+q/2$ are situated at the origin and at the point $(a, 0, 0)$ respectively. The point along the $X$-axis where the electric field vanishes is

The reiation between electric field vector E, the displacement vector D and the polarization vector P for a dielectric placed in electric field E is given by