Four charge `+2q, - 2q,-3q` and `+3q` are kept in the comers of a square of side . The total field at the centre of `k ((nq)/(a^(2))`, find `n.(K = (1)/(4 pi epsi_(0)), "take" sqrt(2) = 1.414)`.

Answer

A, D

Explanation

`vec E= vec E_(+2q)+ vec E_(-3q)+ vec E_(+3q)`
`E=sqrt2(E_(+3q) +E_(-2q))`
`e=sqrt2 (5q)/(4 pi e_0 (a/sqrt2)^2), E=(10 sqrt2 q)/(4 pi e_0 a^2)`