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

Options

A. If the electric field due to a point charge variesas `r^(-2.5)` instead fo `r^(-2)`, then the Gauiss law will still be valid.
B. The Gauss law can be used to calculate the field distributed around on electric dipole.
C. If the electric field between two points charges is zero somewhere , then the sign of the two charges is not the same.
D. Work done in moving a unit positive charge by the external force from point `A` at potential `V_(A)` to point `B` at potential `V_(B)` is `(V_(B) - V_(A))`

Answer

C, D

Explanation

(c ) Electric field is zero on line joining the two charges only, if both the charges are of same nature.
(d) `q_(0) = + 1C`
`V_(B) - V_(A) = (W_(AB))/(q_(0))`, So `V_(B) - V_(A) = W_(AB)`