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

Options

A. If the elctric field dut to a point charge varies as ` r^(-2.5)` instead of ` e^(-2)` , then the Gauss law will still valid .
B. The Gauss law can be used to calculate the field distribution around and eelctic dipole .
C. If the elctric field between two point charges is zero some where , then the sign of the two charges is the same .
D. The work done by the external force in mocing a unit positive charge form point a at potening a unit positive charge from point a at potential ` V_A` to point (B) at potential ` V_B` is (V_B -V_A)`.

Answer

C

Explanation

the soap film in two equal parts .
`(Kw^2)/(a^2) [sqrt 2 + 1/2]` where `K = 1/(4 pi in_0)`

`gamma sqr2 a (Kq^2)/a^2 (sqrt 2 + 1/2), a^3 (Kq^2 )/( gamma) (sqrt 2 + 1/2)`,
`a [q^2/( gamma)]^(1//2) [K ( sqrt 2 + 1/2)]^(1//3) rArr N = 3`
1 where `[ K ( sqrt 2 + 1/2)]^(1//3) rArr N = 3`
where `[ K (sqrt 2 + 1/2 ) ]^(1//2) =k` .