Which of the following statement(s) is/are correct?

Options

A. if the electric field due to a point charge varies as `r^(-2.5)` instead of `r^(-2)`, then Gauss' law will still be valid
B. The Gauss'law can be used to calculate the field distribution around an electric dipole
C. If the electric field at some point between two point charges in zero, then the sign of two charges is the same
D. The work done by the external force in moving a unit positive charge from point A at potential `V_(A)` to point B at potential `V_(B)` is `(V_(B)-V_(A))`

Answer

A, B, C, D