Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure:

Answer

A, D

Explanation

Potential at centroid of `Delta`
`=(Kq)/r+(Kq)/r-(K2q)/r=0`
Dipole moment of system
`=2p cos 30^(@)=sqrt(3)p`
`=sqrt(3)xxqxxL`
`( :' p=qxxL)`